Insomniacs After School

In the small city of Nanao, insomniac Ganta Nakami tries to catch a nap in his school's abandoned astronomical observatory. There he stumbles upon a sociable and carefree girl named Isaki Magari who has the same problem. The two form an awkward friendship and reestablish their school's defunct astronomy club.

;{{nihongo|Ganta Nakami|中見 丸太|Nakami Ganta}}

:{{voiced by|Gen Satō|Adam Gibbs{{cite web|last=Tai|first=Anita|title=HIDIVE Confirms Insomniacs After School Anime's English Dub Cast|url=https://www.animenewsnetwork.com/news/2024-11-19/hidive-confirms-insomniacs-after-school-anime-english-dub-cast/.218063|website=Anime News Network|access-date=November 20, 2024|archive-url=https://web.archive.org/web/20241120105104/https://www.animenewsnetwork.com/news/2024-11-19/hidive-confirms-insomniacs-after-school-anime-english-dub-cast/.218063|archive-date=November 20, 2024|date=November 19, 2024|url-status=live}}}}

:{{Portrayed by|Daiken Okudaira}}

:A high school student of Kuyo High School who suffers from insomnia. He comes off as grumpy and unfriendly due to his condition. However, after meeting Isaki, he opens up to the people around him and reveals to Isaki that the cause of his insomnia is due to separation anxiety caused by his mother leaving him and his father. Ganta is determined to protect the observatory and the revived Astronomy Club, of which he is the president. He becomes Isaki's boyfriend at the end of the club trip during the summer holiday of their first year. He aims to get into a university with a nursing program in Kanazawa, Ishikawa, inspired by his desire to always be at Isaki's side.

;{{nihongo|Isaki Magari|曲 伊咲|Magari Isaki}}

:{{voiced by|Konomi Tamura|Jad Saxton}}

:{{Portrayed by|Nana Mori}}

:A cheerful high school girl who also suffers from insomnia like Ganta. She first discovered the abandoned observatory and made it her sleeping haven, until Ganta came along. As she and Ganta became closer, she shared to him that she is suffering a defective heart condition since birth which requires monthly examinations, frequent hospitalization, and even surgeries. She was the only other member of the Astronomy Club in her first year, and became the vice-president later in the winter of the same year. She started dating Ganta after his confession at the end of their club trip. Initially, she aimed for a university within Ishikawa Prefecture, until she managed to convince her mother to allow her to try for a university in Osaka. Although never mentioned in the manga, it is confirmed by the author, that Magari has Hypoplastic left heart syndrome.{{cite tweet|author=Ojiro, Makoto|number=1671786134593208320|user=nekoteraphoto|title=Dear.Fabi
Kano, the editor in charge, will answer on behalf of Ojiro Makoto Sensei. One of Ojiro's friends had HLHS. She got the idea from him. Additionally, we interviewed multiple pediatric cardiologists to improve accuracy. I would be happy if readers who have the same|date=June 22, 2023|access-date=April 19, 2024}}

;{{nihongo|Yui Shiromaru|白丸 結|Shiromaru Yui}}

:{{voiced by|Haruka Tomatsu{{cite web|last=Cayanan|first=Joanna|title=Insomniacs After School Anime Reveals More Cast & Staff, 2nd Promo Video, Key Visual|url=https://www.animenewsnetwork.com/news/2023-01-04/insomniacs-after-school-anime-reveals-more-cast-and-staff-2nd-promo-video-key-visual/.193549|website=Anime News Network|access-date=January 4, 2023|date=January 4, 2023|archive-date=January 4, 2023|archive-url=https://web.archive.org/web/20230104110453/https://www.animenewsnetwork.com/news/2023-01-04/insomniacs-after-school-anime-reveals-more-cast-and-staff-2nd-promo-video-key-visual/.193549|url-status=live}}|Elissa Cuellar}}

:{{Portrayed by|Minori Hagiwara}}{{cite web|last1=Pineda|first1=Rafael Antonio|last2=Hodgkins|first2=Crystalyn|title=Live-Action Insomniacs After School Film Reveals More Cast|url=https://www.animenewsnetwork.com/news/2023-03-05/live-action-insomniacs-after-school-film-reveals-more-cast/.195634|website=Anime News Network|access-date=March 5, 2023|date=March 5, 2023|archive-date=March 6, 2023|archive-url=https://web.archive.org/web/20230306022716/https://www.animenewsnetwork.com/news/2023-03-05/live-action-insomniacs-after-school-film-reveals-more-cast/.195634|url-status=live}}

:An alumna of the Astronomy Club who runs an arcade near Wakuraonsen Station. She taught Ganta the basics of astrophotography and often acts as the unofficial advisor of the club. She had a crush on a classmate but did not confess to him. Yui lives in a container house next to the arcade and owns a cat named Rollo.

;{{nihongo|Tao Ukegawa|受川 太鳳|Ukegawa Tao}}

:{{voiced by|Seiichiro Yamashita|Blake Weir}}

:{{Portrayed by|Kaisei Kamimura}}

:Ganta's childhood friend and a member of the Student Council. He is composed and usually gives good advice to Ganta whenever the latter feels down.

;{{nihongo|Motoko Kanikawa|蟹川 モトコ|Kanikawa Motoko}}

:{{voiced by|Lynn|Brittney Karbowski}}

:{{Portrayed by|Rico Nagase}}

:Isaki's friend and the daughter of the owners of an {{Transliteration|ja|okonomiyaki}} restaurant. Nicknamed "Motoko Princess" and "Kani", she is perceived as selfish and attention-seeking but is also caring of her family and friends. Motoko has a rivalry with Ganta.

;{{nihongo|Kanami Anamizu|穴水 かなみ|Anamizu Kanami}}

:{{voiced by|Natsumi Fujiwara|Olivia Swasey}}

:{{Portrayed by|Seira Anzai}}

:Isaki's athletic friend who is in the softball club. She has a crush on Hira-senpai of the baseball club. Kanami is often depicted as a strong tomboy but also has a cute side to her: hates ghost stories, likes sweets and love talk.

;{{nihongo|Mina Nono|野々 三奈|Nono Mina}}

:{{voiced by|Sumire Morohoshi|Hilary Haag}}

:{{Portrayed by|Honoka Kawasaki}}

:Isaki's artistic friend who is in the art club. She has a younger brother in elementary school.

;{{nihongo|Usako Kurashiki|倉敷 兎子|Kurashiki Usako}}

:{{voiced by|Mamiko Noto|Patricia Duran}}

:{{Portrayed by|Yuki Sakurai}}

:An alcohol- and cigarette-loving school nurse who is also the Astronomy Club's advisor, despite her zero knowledge of the stars. However, she provides many valuable life lessons to the students and can be responsible when the time comes.

;{{nihongo|Rui Haida|灰田 塁|Haida Rui}}

:{{voiced by|Shō Karino|Brandon Hearnsberger}}

:A blonde high schooler who likes partying and playing around. He quit the baseball club shortly after matriculation. He has had relationships before but seriously falls in love with Kanami. During the group's trip to Osaka, he confessed to Kanami but was rejected.

;{{nihongo|Haya Magari|曲 早矢|Magari Haya}}

:{{voiced by|Sora Amamiya{{cite web|last=Pineda|first=Rafael Antonio|title=Insomniacs After School Anime Casts Sora Amamiya as Isaki's Big Sister|url=https://www.animenewsnetwork.com/news/2023-05-29/insomniacs-after-school-anime-casts-sora-amamiya-as-isaki-big-sister/.198585|website=Anime News Network|access-date=May 30, 2023|date=May 29, 2023|archive-date=May 30, 2023|archive-url=https://web.archive.org/web/20230530020906/https://www.animenewsnetwork.com/news/2023-05-29/insomniacs-after-school-anime-casts-sora-amamiya-as-isaki-big-sister/.198585|url-status=live}}|Natalie Rial}}

:{{Portrayed by|Haruka Kudō}}{{cite web|script-title=ja:映画「君は放課後インソムニア」6月23日公開、追加キャストに工藤遥・斉藤陽一郎ら|url=https://natalie.mu/comic/news/516239|website=Comic Natalie|publisher=Natasha, Inc.|access-date=May 30, 2023|language=ja|date=March 11, 2023|archive-date=May 30, 2023|archive-url=https://web.archive.org/web/20230530021628/https://natalie.mu/comic/news/516239|url-status=live}}

:Isaki's sister, who is four years older. She is a university student currently studying with her boyfriend in Kanazawa. After a sports festival during their elementary years, Haya told herself she should not feel sorry for her sister. Despite their everyday quarrels, she is shown to be caring for Isaki and trusts Ganta to take good care of her sister completely.

;{{nihongo|Kai Shiromaru|白丸 甲斐|Shiromaru Kai}}

:Yui's cousin, who is one year younger than Ganta and Isaki. He joins the Astronomy Club and becomes the next president when Ganta retired from club activities.

;{{nihongo|Akane Furukimi|古君 茜|Furukimi Akane}}

:Ganta and Isaki's underclassman, who is one year younger. She joins the Astronomy Club along with her friend Suzu because she likes photography.

;{{nihongo|Suzu Chiura|千浦すず|Chiura Suzu}}

:Ganta and Isaki's underclassman, who is one year younger. She joins the Astronomy Club due to her love for science and astronomy.

Written and illustrated by Makoto Ojiro, Insomniacs After School was serialized in Shogakukan's Seinen manga magazine Weekly Big Comic Spirits from May 20, 2019,{{cite web|script-title=ja:「猫のお寺の知恩さん」のオジロマコトが不眠症の少年少女描く新連載、スピで開幕|url=https://natalie.mu/comic/news/332115|website=Comic Natalie|publisher=Natasha, Inc.|access-date=October 25, 2021|language=ja|date=May 20, 2019|archive-date=October 27, 2021|archive-url=https://web.archive.org/web/20211027034446/https://natalie.mu/comic/news/332115|url-status=live}} to August 21, 2023.{{cite web|last=Cayanan|first=Joanna|title=Insomniacs After School Manga Ends in 2 Chapters|url=https://www.animenewsnetwork.com/news/2023-07-17/insomniacs-after-school-manga-ends-in-2-chapters/.200331|website=Anime News Network|access-date=July 17, 2023|date=July 17, 2023|archive-date=July 17, 2023|archive-url=https://web.archive.org/web/20230717180232/https://www.animenewsnetwork.com/news/2023-07-17/insomniacs-after-school-manga-ends-in-2-chapters/.200331|url-status=live}}{{cite web|script-title=ja:「君は放課後インソムニア」4年の連載に幕 アニメ化＆実写映画化もされた青春物語|url=https://natalie.mu/comic/news/537625|website=Comic Natalie|publisher=Natasha, Inc.|access-date=August 21, 2023|language=ja|date=August 21, 2023|archive-date=August 21, 2023|archive-url=https://web.archive.org/web/20230821071015/https://natalie.mu/comic/news/537625|url-status=live}} Shogakukan has collected its chapters into individual {{Transliteration|ja|tankōbon}} volumes. The first volume was released on September 12, 2019.{{cite web|script-title=ja:眠れない夜もひとりじゃない、オジロマコトの青春物語「君は放課後インソムニア」1巻|url=https://natalie.mu/comic/news/347281|website=Comic Natalie|publisher=Natasha, Inc.|access-date=October 25, 2021|language=ja|date=September 12, 2019|archive-date=May 16, 2022|archive-url=https://web.archive.org/web/20220516064639/https://natalie.mu/comic/news/347281|url-status=live}} As of October 12, 2023, fourteen volumes have been released.

In June 2022, Viz Media announced that they licensed the series for English publication.{{cite web|title=Viz Media Announces Spring 2023 Book Releases Including Nine Dragons' Ball Parade, Choujin X, Helck, Tista, More Manga|url=https://www.animenewsnetwork.com/news/2022-06-17/viz-media-announces-spring-2023-book-releases-including-nine-dragons-ball-parade-choujin-x-helck-/.186778|website=Anime News Network|last=Mateo|first=Alex|date=June 17, 2022|access-date=June 17, 2022|archive-date=June 18, 2022|archive-url=https://web.archive.org/web/20220618065612/https://www.animenewsnetwork.com/news/2022-06-17/viz-media-announces-spring-2023-book-releases-including-nine-dragons-ball-parade-choujin-x-helck-/.186778|url-status=live}} On May 9, 2023, Viz Media launched their Viz Manga digital manga service, with the series' chapters receiving simultaneous English publication in North America as they are released in Japan.{{cite web|last=Cayanan|first=Joanna|title=Viz Media Simultaneously Releases Shogakukan Manga Titles in New VIZ Manga App|url=https://www.animenewsnetwork.com/news/2023-05-09/viz-media-simultaneously-releases-shogakukan-manga-titles-in-new-viz-manga-app/.197912|website=Anime News Network|access-date=May 9, 2023|archive-url=https://web.archive.org/web/20230510113238/https://www.animenewsnetwork.com/news/2023-05-09/viz-media-simultaneously-releases-shogakukan-manga-titles-in-new-viz-manga-app/.197912|archive-date=May 10, 2023|date=May 9, 2023|url-status=live}}{{cite web|last=Diaz|first=Ana|title=Viz's new subscription service will deliver translated manga the same day it's out in Japan|url=https://www.polygon.com/23711092/viz-media-new-subscription-app-manga-shojo|website=Polygon|access-date=May 10, 2023|archive-url=https://web.archive.org/web/20230510113247/https://www.polygon.com/23711092/viz-media-new-subscription-app-manga-shojo|archive-date=May 10, 2023|date=May 9, 2023|url-status=live}}

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|RelDate = September 12, 2019{{cite web|script-title=ja:【9月12日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/347081|website=Comic Natalie|publisher=Natasha, Inc.|access-date=October 25, 2021|language=ja|date=September 12, 2019|archive-date=October 27, 2021|archive-url=https://web.archive.org/web/20211027005732/https://natalie.mu/comic/news/347081|url-status=live}}

|ISBN = 978-4-09-860395-4

|LicensedRelDate= March 21, 2023{{cite web|title=Insomniacs After School, Vol. 1|url=https://www.viz.com/read/manga/insomniacs-after-school-volume-1/product/7387|publisher=Viz Media|access-date=November 27, 2022|archive-date=November 27, 2022|archive-url=https://web.archive.org/web/20221127212413/https://www.viz.com/read/manga/insomniacs-after-school-volume-1/product/7387|url-status=live}}

|LicensedISBN= 978-1-9747-3657-7

}}

{{Graphic novel list

|VolumeNumber = 2

|RelDate = December 12, 2019{{cite web|script-title=ja:【12月12日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/359000|website=Comic Natalie|publisher=Natasha, Inc.|access-date=October 25, 2021|language=ja|date=December 12, 2019|archive-date=October 25, 2021|archive-url=https://web.archive.org/web/20211025160743/https://natalie.mu/comic/news/359000|url-status=live}}

|ISBN = 978-4-09-860457-9

|LicensedRelDate= June 20, 2023{{cite web|title=Insomniacs After School, Vol. 2|url=https://www.viz.com/read/manga/insomniacs-after-school-volume-2/product/7486|publisher=Viz Media|access-date=March 1, 2023|archive-date=March 1, 2023|archive-url=https://web.archive.org/web/20230301184646/https://www.viz.com/read/manga/insomniacs-after-school-volume-2/product/7486|url-status=live}}

|LicensedISBN= 978-1-9747-3703-1

}}

{{Graphic novel list

|VolumeNumber = 3

|RelDate = April 10, 2020{{cite web|script-title=ja:【4月10日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/374689|website=Comic Natalie|publisher=Natasha, Inc.|access-date=October 25, 2021|language=ja|date=April 10, 2020|archive-date=April 10, 2020|archive-url=https://web.archive.org/web/20200410180847/https://natalie.mu/comic/news/374689|url-status=live}}

|ISBN = 978-4-09-860573-6

|LicensedRelDate= September 19, 2023{{cite web|title=Insomniacs After School, Vol. 3|url=https://www.viz.com/read/manga/insomniacs-after-school-volume-3/product/7578|publisher=Viz Media|access-date=May 25, 2023|archive-date=May 25, 2023|archive-url=https://web.archive.org/web/20230525152118/https://www.viz.com/read/manga/insomniacs-after-school-volume-3/product/7578|url-status=live}}

|LicensedISBN= 978-1-9747-4042-0

}}

{{Graphic novel list

|VolumeNumber = 4

|RelDate = August 7, 2020{{cite web|script-title=ja:【8月7日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/390799|website=Comic Natalie|publisher=Natasha, Inc.|access-date=October 25, 2021|language=ja|date=August 7, 2020|archive-date=October 25, 2021|archive-url=https://web.archive.org/web/20211025160521/https://natalie.mu/comic/news/390799|url-status=live}}

|ISBN = 978-4-09-860692-4

|LicensedRelDate= December 19, 2023{{cite web|title=Insomniacs After School, Vol. 4|url=https://www.viz.com/read/manga/insomniacs-after-school-volume-4/product/7673|publisher=Viz Media|access-date=August 31, 2023|archive-date=August 31, 2023|archive-url=https://web.archive.org/web/20230831220310/https://www.viz.com/read/manga/insomniacs-after-school-volume-4/product/7673|url-status=live}}

|LicensedISBN= 978-1-9747-4104-5

}}

{{Graphic novel list

|VolumeNumber = 5

|RelDate = December 11, 2020{{cite web|script-title=ja:【12月11日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/408163|website=Comic Natalie|publisher=Natasha, Inc.|access-date=October 25, 2021|language=ja|date=December 11, 2020|archive-date=October 25, 2021|archive-url=https://web.archive.org/web/20211025160947/https://natalie.mu/comic/news/408163|url-status=live}}

|ISBN = 978-4-09-860781-5

|LicensedRelDate= March 19, 2024{{cite web|title=Insomniacs After School, Vol. 5|url=https://www.viz.com/read/manga/insomniacs-after-school-volume-5/product/7774|publisher=Viz Media|access-date=November 23, 2023|archive-date=December 19, 2023|archive-url=https://web.archive.org/web/20231219200313/https://www.viz.com/read/manga/insomniacs-after-school-volume-5/product/7774|url-status=live}}

|LicensedISBN= 978-1-9747-4321-6

}}

{{Graphic novel list

|VolumeNumber = 6

|RelDate = April 12, 2021{{cite web|script-title=ja:【4月12日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/423777|website=Comic Natalie|publisher=Natasha, Inc.|access-date=October 25, 2021|language=ja|date=April 12, 2021|archive-date=October 25, 2021|archive-url=https://web.archive.org/web/20211025160431/https://natalie.mu/comic/news/423777|url-status=live}}

|ISBN = 978-4-09-860879-9

|LicensedRelDate= June 18, 2024{{cite web|title=Insomniacs After School, Vol. 6|url=https://www.viz.com/read/manga/insomniacs-after-school-volume-6/product/7886|publisher=Viz Media|access-date=March 1, 2024|archive-date=March 11, 2024|archive-url=https://web.archive.org/web/20240311154834/https://www.viz.com/read/manga/insomniacs-after-school-volume-6/product/7886|url-status=live}}

|LicensedISBN= 978-1-9747-4580-7

}}

{{Graphic novel list

|VolumeNumber = 7

|RelDate = October 29, 2021{{cite web|script-title=ja:【10月29日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/451183|website=Comic Natalie|publisher=Natasha, Inc.|access-date=November 11, 2021|language=ja|date=October 29, 2021|archive-date=January 9, 2023|archive-url=https://web.archive.org/web/20230109142931/https://natalie.mu/comic/news/451183|url-status=live}}

|ISBN = 978-4-09-861142-3

|LicensedRelDate= September 17, 2024{{cite web|title=Insomniacs After School, Vol. 7|url=https://www.viz.com/read/manga/insomniacs-after-school-volume-7/product/8003|publisher=Viz Media|access-date=June 2, 2024}}

|LicensedISBN= 978-1-9747-4879-2

}}

{{Graphic novel list

|VolumeNumber = 8

|RelDate = January 12, 2022{{cite web|script-title=ja:オジロマコト「君は放課後インソムニア」TVアニメ化＆実写映画化が決定|url=https://natalie.mu/comic/news/461265|website=Comic Natalie|publisher=Natasha, Inc.|access-date=January 12, 2022|language=ja|date=January 12, 2022|archive-date=January 14, 2022|archive-url=https://web.archive.org/web/20220114050825/https://natalie.mu/comic/news/461265|url-status=live}}

|ISBN = 978-4-09-861215-4

|LicensedRelDate= December 17, 2024{{cite web|title=Insomniacs After School, Vol. 8|url=https://www.viz.com/read/manga/insomniacs-after-school-volume-8/product/8121|publisher=Viz Media|access-date=August 28, 2024}}

|LicensedISBN= 978-1-9747-4947-8

}}

{{Graphic novel list

|VolumeNumber = 9

|RelDate = June 10, 2022{{cite web|script-title=ja:【6月10日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/480797|website=Comic Natalie|publisher=Natasha, Inc.|access-date=June 11, 2022|language=ja|date=June 10, 2022|archive-date=June 12, 2022|archive-url=https://web.archive.org/web/20220612235828/https://natalie.mu/comic/news/480797|url-status=live}}

|ISBN = 978-4-09-861314-4

|LicensedRelDate= March 18, 2025{{cite web|title=Insomniacs After School, Vol. 9|url=https://www.viz.com/read/manga/insomniacs-after-school-volume-9/product/8121|publisher=Viz Media|access-date=November 22, 2024}}

|LicensedISBN= 978-1-9747-5213-3

}}

{{Graphic novel list

|VolumeNumber = 10

|RelDate = September 12, 2022{{cite web|script-title=ja:【9月12日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/492356|website=Comic Natalie|publisher=Natasha, Inc.|access-date=September 16, 2022|language=ja|date=September 12, 2022|archive-date=September 13, 2022|archive-url=https://web.archive.org/web/20220913085346/https://natalie.mu/comic/news/492356|url-status=live}}

|ISBN = 978-4-09-861428-8

|LicensedRelDate= June 17, 2025{{cite web|title=Insomniacs After School, Vol. 10|url=https://www.viz.com/read/manga/insomniacs-after-school-volume-10/product/8367|publisher=Viz Media|access-date=March 4, 2025}}

|LicensedISBN= 978-1-9747-5572-1

}}

{{Graphic novel list

|VolumeNumber = 11

|RelDate = January 12, 2023{{cite web|script-title=ja:【1月12日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/508258|website=Comic Natalie|publisher=Natasha, Inc.|access-date=January 20, 2023|language=ja|date=January 12, 2023|archive-date=January 16, 2023|archive-url=https://web.archive.org/web/20230116120843/https://natalie.mu/comic/news/508258|url-status=live}}

|ISBN = 978-4-09-861499-8

|LicensedRelDate= —

|LicensedISBN=

}}

{{Graphic novel list

|VolumeNumber = 12

|RelDate = April 6, 2023{{cite web|script-title=ja:【4月6日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/519247|website=Comic Natalie|publisher=Natasha, Inc.|access-date=April 10, 2023|language=ja|date=April 6, 2023|archive-date=April 11, 2023|archive-url=https://web.archive.org/web/20230411023054/https://natalie.mu/comic/news/519247|url-status=live}}

|ISBN = 978-4-09-861613-8

|LicensedRelDate= —

|LicensedISBN=

}}

{{Graphic novel list

|VolumeNumber = 13

|RelDate = June 12, 2023{{cite web|script-title=ja:【6月12日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/526710|website=Comic Natalie|publisher=Natasha, Inc.|access-date=April 10, 2023|language=ja|date=June 12, 2023|archive-date=June 12, 2023|archive-url=https://web.archive.org/web/20230612000035/https://natalie.mu/comic/news/526710|url-status=live}}

|ISBN = 978-4-09-861721-0

|LicensedRelDate= —

|LicensedISBN=

}}

{{Graphic novel list

|VolumeNumber = 14

|RelDate = October 12, 2023{{cite web|script-title=ja:【10月12日付】本日発売の単行本リスト|url=https://natalie.mu/comic/news/542717|website=Comic Natalie|publisher=Natasha, Inc.|access-date=October 23, 2023|language=ja|date=October 12, 2023|archive-date=October 16, 2023|archive-url=https://web.archive.org/web/20231016233143/https://natalie.mu/comic/news/542717|url-status=live}}

|ISBN = 978-4-09-862536-9

|LicensedRelDate= —

|LicensedISBN=

}}

{{Graphic novel list/footer}}

In January 2022, an anime television series adaptation was announced.{{cite web|last=Pineda|first=Rafael|title=Makoto Ojiro's Insomniacs After School Manga Gets TV Anime, Live-Action Film (Updated)|url=https://www.animenewsnetwork.com/news/2022-01-11/makoto-ojiro-insomniacs-after-school-manga-gets-tv-anime-live-action-film/.181421|website=Anime News Network|access-date=January 12, 2022|date=January 12, 2022|archive-date=June 22, 2022|archive-url=https://web.archive.org/web/20220622080929/https://www.animenewsnetwork.com/news/2022-01-11/makoto-ojiro-insomniacs-after-school-manga-gets-tv-anime-live-action-film/.181421|url-status=live}} The series is produced by Liden Films and directed by Yūki Ikeda, with scripts written by Rintarō Ikeda, character designs handled by Yuki Fukuda, and music composed by Yuki Hayashi. It aired from April 11 to July 4, 2023, on TV Tokyo and other channels.{{cite web|last=Loo|first=Egan|title=Insomniacs After School Anime's 1st Video Unveils Cast, Staff, 2023 Debut|url=https://www.animenewsnetwork.com/news/2022-06-08/insomniacs-after-school-anime-1st-video-unveils-cast-staff-2023-debut/.186444|website=Anime News Network|access-date=June 8, 2022|date=June 8, 2022|archive-date=June 22, 2022|archive-url=https://web.archive.org/web/20220622083342/https://www.animenewsnetwork.com/news/2022-06-08/insomniacs-after-school-anime-1st-video-unveils-cast-staff-2023-debut/.186444|url-status=live}}{{cite web|last=Cayanan|first=Joanna|title=Insomniacs After School Anime Premieres in April 2023|url=https://www.animenewsnetwork.com/news/2022-12-27/insomniacs-after-school-anime-premieres-in-april-2023/.193395|website=Anime News Network|access-date=December 27, 2022|date=December 27, 2022|archive-date=December 27, 2022|archive-url=https://web.archive.org/web/20221227100440/https://www.animenewsnetwork.com/news/2022-12-27/insomniacs-after-school-anime-premieres-in-april-2023/.193395|url-status=live}}{{efn|name=TXN|TV Tokyo lists the premiere for the series on Monday at 24:00, which is effectively Tuesday at midnight JST.{{cite web|script-title=ja:アニメ「君は放課後インソムニア」は4月10日から、OPはaiko「いつ逢えたら」|url=https://natalie.mu/comic/news/515417|website=Comic Natalie|publisher=Natasha, Inc.|access-date=March 5, 2023|language=ja|date=March 5, 2023|archive-date=March 12, 2023|archive-url=https://web.archive.org/web/20230312123948/https://natalie.mu/comic/news/515417|url-status=live}}}} The opening theme song is {{nihongo|"Itsu Aetara"|いつ逢えたら||"When Can We Meet"}} by Aiko, while the ending theme song is {{nihongo|"Lapse"|ラプス}} by Homecomings.{{cite web|last=Hodgkins|first=Crystalyn|title=Homecomings Performs Ending Theme for Insomniacs After School Anime|url=https://www.animenewsnetwork.com/news/2023-02-17/homecomings-performs-ending-theme-for-insomniacs-after-school-anime/.195015|website=Anime News Network|access-date=February 17, 2023|date=February 17, 2023|archive-date=February 17, 2023|archive-url=https://web.archive.org/web/20230217105036/https://www.animenewsnetwork.com/news/2023-02-17/homecomings-performs-ending-theme-for-insomniacs-after-school-anime/.195015|url-status=live}}{{cite web|last=Hodgkins|first=Crystalyn|title=Insomniacs After School Anime Unveils 3rd Video, More Staff, Opening Song Artist aiko, April 10 Debut|url=https://www.animenewsnetwork.com/news/2023-03-05/insomniacs-after-school-anime-unveils-3rd-video-more-staff-opening-song-artist-aiko-april-10-debut/.195609|website=Anime News Network|access-date=March 5, 2023|date=March 5, 2023|archive-date=March 5, 2023|archive-url=https://web.archive.org/web/20230305135242/https://www.animenewsnetwork.com/news/2023-03-05/insomniacs-after-school-anime-unveils-3rd-video-more-staff-opening-song-artist-aiko-april-10-debut/.195609|url-status=live}}

Sentai Filmworks licensed the series and is streaming it on Hidive.{{cite web|last=Mateo|first=Alex|title=HIDIVE to Stream alice gear aegis Expansion, Insomniacs after school, Otaku Elf, Too Cute Crisis Anime|url=https://www.animenewsnetwork.com/news/2023-03-16/hidive-to-stream-alice-gear-aegis-expansion-insomniacs-after-school-otaku-elf-too-cute-crisis-anime/.196048|website=Anime News Network|access-date=March 16, 2023|date=March 16, 2023|archive-date=March 16, 2023|archive-url=https://web.archive.org/web/20230316173614/https://www.animenewsnetwork.com/news/2023-03-16/hidive-to-stream-alice-gear-aegis-expansion-insomniacs-after-school-otaku-elf-too-cute-crisis-anime/.196048|url-status=live}} An English dub was later released starting in November 2024. Muse Communication has licensed the series in Southeast Asia.{{cite web|last=Pineda|first=Rafael|title=Muse Asia Licenses Dark Gathering, Insomniacs After School Anime|url=https://www.animenewsnetwork.com/news/2023-05-12/muse-asia-licenses-dark-gathering-insomniacs-after-school-anime/.198005|website=Anime News Network|access-date=May 12, 2023|date=May 12, 2023|archive-date=August 21, 2023|archive-url=https://web.archive.org/web/20230821072013/https://www.animenewsnetwork.com/news/2023-05-12/muse-asia-licenses-dark-gathering-insomniacs-after-school-anime/.198005|url-status=live}}

{{Episode table

|background=

|overall=

|title=

|titleR={{cite web|url=https://kimisomu-anime.com/story/|title=Sutōrī {{!}} Terebi Anime "Kimi wa Hōkago Insomunia" Kōshiki Saito|language=ja|script-title=ja:Story {{!}} TVアニメ「君は放課後インソムニア」公式サイト|trans-title=Story {{!}} TV Anime "Insomniacs After School" Official Website|website=kimisomu-anime.com|access-date=April 10, 2023|archive-date=April 10, 2023|archive-url=https://web.archive.org/web/20230410145351/https://kimisomu-anime.com/story/|url-status=live}}{{cite web|url=https://www.hidive.com/tv/insomniacs-after-school|title=Stream Insomniacs After School on HIDIVE|publisher=Hidive|access-date=April 10, 2023|archive-date=December 16, 2023|archive-url=https://web.archive.org/web/20231216145234/https://www.hidive.com/tv/insomniacs-after-school}}

|director=

|directorR={{efn|name=credits|Information is taken from the ending credits of each episode.}}

|writer=

|writerR={{efn|name=credits}}

|aux2=

|aux2T=Storyboarded by

|aux2R={{efn|name=credits}}

|airdate=

|airdateR={{cite web|url=https://kimisomu-anime.com/onair/|title=On'ea {{!}} Terebi Anime "Kimi wa Hōkago Insomunia" Kōshiki Saito|language=ja|script-title=ja:On air {{!}} TVアニメ「君は放課後インソムニア」公式サイト|trans-title=On Air {{!}} TV Anime "Insomniacs After School" Official Website|website=kimisomu-anime.com|access-date=April 10, 2023|archive-date=April 14, 2023|archive-url=https://web.archive.org/web/20230414203758/https://kimisomu-anime.com/onair/|url-status=live}}

|episodes=

{{Episode list

| EpisodeNumber = 1

| Title = Capella

| TranslitTitle = Notoboshi -Giyoshiyaza Kapera-

| NativeTitle = {{Ruby-ja|能|の}}{{Ruby-ja|登|と}}{{Ruby-ja|星|ぼし}} ぎよしや座力ぺラ

| NativeTitleLangCode = ja

| DirectedBy = Yūki Ikeda

| WrittenBy = Rintarō Ikeda

| Aux2 = Yūki Ikeda

| OriginalAirDate = {{Start date|2023|4|11}}

| ShortSummary =

}}

{{Episode list

| EpisodeNumber = 2

| Title = Upsilon and Lambda Scorpii

| TranslitTitle = Neko no Meboshi -Sasoriza no Nibanboshi-

| NativeTitle = {{Ruby-ja|猫|ねこ}}の{{Ruby-ja|⽬|め}}{{Ruby-ja|星|ぼし}} さそり座の二番星

| NativeTitleLangCode = ja

| DirectedBy = Taisuke Mamoru

| WrittenBy = Rintarō Ikeda

| Aux2 = Tomoko Akiyama

| OriginalAirDate = {{Start date|2023|4|18}}

| ShortSummary =

}}

{{Episode list

| EpisodeNumber = 3

| Title = Fomalhaut

| TranslitTitle = Hitotsu Boshisan -Fuōmaruhauto-

| NativeTitle = {{Ruby-ja|⼀|ひと}}つ{{Ruby-ja|星|ぼし}}さん フオー{{Ruby-ja|マル|うわ座}}ハウト

| NativeTitleLangCode = ja

| DirectedBy = Ikuhiro Matsui

| WrittenBy = Rintarō Ikeda

| Aux2 = Yūki Ikeda

| OriginalAirDate = {{Start date|2023|4|25}}

| ShortSummary =

}}

{{Episode list

| EpisodeNumber = 4

| Title = Venus

| TranslitTitle = Amatsumikaboshi -Kanaboshi-

| NativeTitle = {{Ruby-ja|天|あま}}{{Ruby-ja|津|つ}}{{Ruby-ja|甕|みか}}{{Ruby-ja|星|ぼし}} 金星

| NativeTitleLangCode = ja

| DirectedBy = Rokō Ogiwara

| WrittenBy = Rintarō Ikeda

| Aux2 = Kenji Setō

| OriginalAirDate = {{Start date|2023|5|2}}

| ShortSummary =

}}

{{Episode list

| EpisodeNumber = 5

| Title = Canopus

| TranslitTitle = Tobiagariboshi -Riyūkotsuhoshi Kanōpusu-

| NativeTitle = {{Ruby-ja|⾶|と}}び{{Ruby-ja|上|あ}}がり{{Ruby-ja|星|ぼし}} りゅうこつ星 力ノープス

| NativeTitleLangCode = ja

| DirectedBy = Yasuyuki Shinozaki

| WrittenBy = Rintarō Ikeda

| Aux2 = Michio Fukuda,
Kenji Setō,
Yūichi Itō

| OriginalAirDate = {{Start date|2023|5|9}}

| ShortSummary =

}}

{{Episode list

| EpisodeNumber = 6

| Title = Shooting Star

| TranslitTitle = Hashiriboshi -Ryūsei-

| NativeTitle = {{Ruby-ja|走|はし}}り{{Ruby-ja|星|ぼし}} 流星

| NativeTitleLangCode = ja

| DirectedBy = Taisuke Mamoru

| WrittenBy = Rintarō Ikeda

| Aux2 = Taisuke Mamoru

| OriginalAirDate = {{Start date|2023|5|16}}

| ShortSummary =

}}

{{Episode list

| EpisodeNumber = 7

| Title = The Fireworks Star

| TranslitTitle = Hanabiboshi -Pureadesu Hoshi-

| NativeTitle = {{Ruby-ja|花|な}}{{Ruby-ja|⽕|び}}{{Ruby-ja|星|ぼし}} プレアデス星团

| NativeTitleLangCode = ja

| DirectedBy = Kazuya Fujishiro

| WrittenBy = Rintarō Ikeda

| Aux2 = Tomoko Akiyama

| OriginalAirDate = {{Start date|2023|5|23}}{{efn|This episode aired at 12:30 a.m. JST, 30 minutes after the original air time on TV Tokyo.}}

| ShortSummary =

}}

{{Episode list

| EpisodeNumber = 8

| Title = The Congregation Star

| TranslitTitle = Atsumariboshi -Pureadesu Hoshi-

| NativeTitle = {{Ruby-ja|集|あつ}}まり{{Ruby-ja|星|ぼし}} プレアデス星团

| NativeTitleLangCode = ja

| DirectedBy = Daiki Handa

| WrittenBy = Rintarō Ikeda

| Aux2 = Satoshi Shimizu

| OriginalAirDate = {{Start date|2023|5|30}}

| ShortSummary =

}}

{{Episode list

| EpisodeNumber = 9

| Title = Altair and Vega

| TranslitTitle = Hoshiai -Arutairu・Bega-

| NativeTitle = {{Ruby-ja|星|ほし}}{{Ruby-ja|合|あい}} アルタイル・ベガ

| NativeTitleLangCode = ja

| DirectedBy = Rokō Ogiwara

| WrittenBy = Rintarō Ikeda

| Aux2 = Yūichi Itō

| OriginalAirDate = {{Start date|2023|6|6}}

| ShortSummary =

}}

{{Episode list

| EpisodeNumber = 10

| Title = Spica of Virgo

| TranslitTitle = Anehanboshi -Otomeza Supica-

| NativeTitle = {{Ruby-ja|姉|あね}}はん{{Ruby-ja|星|ぼし}} 乙女座スピ力

| NativeTitleLangCode = ja

| DirectedBy = Sōta Yokote

| WrittenBy = Rintarō Ikeda

| Aux2 = Sōta Yokote

| OriginalAirDate = {{Start date|2023|6|13}}

| ShortSummary =

}}

{{Episode list

| EpisodeNumber = 11

| Title = The First Stars of Dawn

| TranslitTitle = Yoake no Ichibanboshi -Pureadesu Hoshi-

| NativeTitle = {{Ruby-ja|夜|よ}}{{Ruby-ja|明|あ}}けの{{Ruby-ja|一|いち}}{{Ruby-ja|番|ばん}}{{Ruby-ja|星|ぼし}} プレアデス星团

| NativeTitleLangCode = ja

| DirectedBy = Kazunari Araki

| WrittenBy = Rintarō Ikeda

| Aux2 = Tomoko Akiyama

| OriginalAirDate = {{Start date|2023|6|20}}

| ShortSummary =

}}

{{Episode list

| EpisodeNumber = 12

| Title = Planet

| TranslitTitle = Mayoiboshi -Wakusei-

| NativeTitle = {{Ruby-ja|迷|まよ}}い{{Ruby-ja|星|ぼし}} 惑星

| NativeTitleLangCode = ja

| DirectedBy = Satoshi Toba

| WrittenBy = Rintarō Ikeda

| Aux2 = Sōta Yokote,
Yūki Ikeda

| OriginalAirDate = {{Start date|2023|6|27}}

| ShortSummary =

}}

{{Episode list

| EpisodeNumber = 13

| Title = Methuselah

| TranslitTitle = Saikoboshi -Metotsuera-

| NativeTitle = {{Ruby-ja|最|さい}}{{Ruby-ja|古|こ}}の{{Ruby-ja|星|ぼし}} メトツエラ

| NativeTitleLangCode = ja

| DirectedBy = Yūki Ikeda,
Kayonaka Yamada

| WrittenBy = Rintarō Ikeda

| Aux2 = Shinobu Yoshioka

| OriginalAirDate = {{Start date|2023|7|4}}

| ShortSummary =

}}

}}

{{main|Insomniacs After School (film)}}

In January 2022, a live-action film adaptation was announced. The film is directed by Chihiro Ikeda, produced by United Productions, and distributed by Pony Canyon. The film premiered on June 23, 2023.{{cite web|last1=Loo|first1=Egan|title=Live-Action Insomniacs After School Film Unveils Cast, Staff, 2023 Opening|url=https://www.animenewsnetwork.com/news/2022-09-06/live-action-insomniacs-after-school-film-unveils-cast-staff-2023-opening/.189391|website=Anime News Network|access-date=September 7, 2022|date=September 7, 2022|archive-date=September 6, 2022|archive-url=https://web.archive.org/web/20220906234834/https://www.animenewsnetwork.com/news/2022-09-06/live-action-insomniacs-after-school-film-unveils-cast-staff-2023-opening/.189391|url-status=live}}{{cite web|last=Pineda|first=Rafael Antonio|title=Live-Action Insomniacs After School Film's Teaser Reveals June Opening|url=https://www.animenewsnetwork.com/news/2023-01-24/live-action-insomniacs-after-school-film-teaser-reveals-june-opening/.194158|website=Anime News Network|access-date=January 25, 2023|date=January 25, 2023|archive-date=January 25, 2023|archive-url=https://web.archive.org/web/20230125011120/https://www.animenewsnetwork.com/news/2023-01-24/live-action-insomniacs-after-school-film-teaser-reveals-june-opening/.194158|url-status=live}}{{cite web|last=Hodgkins|first=Crystalyn|title=Live-Action Insomniacs After School Film Reveals More Cast, June 23 Debut|url=https://www.animenewsnetwork.com/news/2023-03-11/live-action-insomniacs-after-school-film-reveals-more-cast-june-23-debut/.195822|website=Anime News Network|access-date=March 11, 2023|date=March 11, 2023|archive-date=March 11, 2023|archive-url=https://web.archive.org/web/20230311072329/https://www.animenewsnetwork.com/news/2023-03-11/live-action-insomniacs-after-school-film-reveals-more-cast-june-23-debut/.195822|url-status=live}} The film was later selected by Fantasia Film Festival, to be presented at the 2023 edition.{{cite web|last=Bałaga|first=Marta|title=Fantasia Announces Opening Film 'Red Rooms,' Second Wave of Titles: 'The Audience is Going to Be Left Completely Breathless'|url=https://variety.com/2023/film/festivals/fantasia-larry-kent-nicolas-cage-1235637126/|website=Variety|date=June 8, 2023|access-date=July 25, 2023|archive-date=July 25, 2023|archive-url=https://web.archive.org/web/20230725130713/https://variety.com/2023/film/festivals/fantasia-larry-kent-nicolas-cage-1235637126/|url-status=live}}

The Japanese band {{ill|Macaroni Enpitsu|ja|マカロニえんぴつ}} released a music video for their single {{nihongo|"Enshin"|遠心||"Centrifuge"}}, which featured art from the manga, on November 21, 2019.{{cite web|script-title=ja:オジロマコト「君は放課後インソムニア」×マカロニえんぴつ新曲のコラボ動画|url=https://natalie.mu/comic/news/356316|website=Comic Natalie|publisher=Natasha, Inc.|access-date=October 24, 2021|language=ja|date=November 21, 2019|archive-date=October 25, 2021|archive-url=https://web.archive.org/web/20211025160601/https://natalie.mu/comic/news/356316|url-status=live}}{{cite web|last=Loveridge|first=Lynzee|title=Rock Band Macaroni Enpitsu Teams Up With Manga Creator Makoto Ojiro|url=https://www.animenewsnetwork.com/interest/2019-11-22/rock-band-macaroni-enpitsu-teams-up-with-manga-creator-makoto-ojiro/.153583|website=Anime News Network|access-date=October 24, 2021|date=November 22, 2019|archive-date=January 13, 2022|archive-url=https://web.archive.org/web/20220113004034/https://www.animenewsnetwork.com/interest/2019-11-22/rock-band-macaroni-enpitsu-teams-up-with-manga-creator-makoto-ojiro/.153583|url-status=live}}

In 2020, Insomniacs After School was one of the 50 nominees for the 6th Next Manga Awards in the print category.{{cite web|script-title=ja:コミックス部門 結果発表 - 次にくるマンガ大賞 2020|url=https://tsugimanga.jp/winner2020-comics/|website=Tsugi Manga|language=ja|access-date=June 15, 2023|archive-url=https://web.archive.org/web/20200820203029/https://tsugimanga.jp/winner2020-comics/|archive-date=August 20, 2020}} Insomniacs After School also won the Mandō Kobayashi Manga Grand Prix 2023, created by comedian and manga enthusiast Kendo Kobayashi.{{cite tweet|author=Makoto, Ojiro|number=1614137089922306048|user=nekoteraphoto|script-title=ja:マンガ『【㊗️マジです🎉】数ある漫画賞の中でたった1人の男の信念のみで築き上げた漫画讃歌「漫道コバヤシ漫画大賞」✨2022グランプリ✨🏆 #君は放課後インソムニア 🏆1/28放送のオジロマコト先生とケンコバさんの異種格闘対談は必見です😄選出ありがとうございます！！#スピリッツ|date=January 14, 2023|access-date=February 3, 2023|language=ja}} The series was also listed in the top 10 in the 2024 edition of the Young Adult Library Services Association's Great Graphic Novels for Teens.{{cite web|last=Hazra|first=Adriana|title=Insomniacs After School Manga Makes YALSA's 2024 Great Graphic Novels for Teens Top 10 List|url=https://www.animenewsnetwork.com/news/2024-03-11/insomniacs-after-school-manga-makes-yalsa-2024-great-graphic-novels-for-teens-top-10-list/.208521|website=Anime News Network|access-date=March 11, 2024|date=March 11, 2024|archive-date=March 11, 2024|archive-url=https://web.archive.org/web/20240311154836/https://www.animenewsnetwork.com/news/2024-03-11/insomniacs-after-school-manga-makes-yalsa-2024-great-graphic-novels-for-teens-top-10-list/.208521|url-status=live}}

{{notelist}}

{{reflist}}

• {{Official website|https://bigcomicbros.net/work/6437/|Official manga website at Big Comic Bros}} {{in lang|ja}}
• {{Official website|https://kimisomu-anime.com/|Official anime website}} {{in lang|ja}}
• {{Anime News Network|manga|25118}}

{{Weekly Big Comic Spirits}}

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