Kep1er

File:Kep1er-logo.svg

"Kep1er" was a name suggested by viewers of Girls Planet 999 through the website Naver.{{Cite web|title= 데뷔 그룹명 공모전|url=https://form.office.naver.com/form/responseView.cmd?formkey=YTY5Nzg2ZTAtMzViYS00NzY5LTkxN2UtMzkwMjA3NzJlNjlm&sourceId=urlshare|website=Naver|language=ko|date=October 2021|access-date=November 29, 2021|archive-date=November 29, 2021|archive-url=https://web.archive.org/web/20211129060317/https://form.office.naver.com/form/responseView.cmd?formkey=YTY5Nzg2ZTAtMzViYS00NzY5LTkxN2UtMzkwMjA3NzJlNjlm&sourceId=urlshare|url-status=live}} The name is a reference to the planets in the Kepler star systems named after the 16th century astronomer Johannes Kepler.{{Cite web|title=Who are KEP1ER? Band name meaning and how to pronounce it|url=https://www.hitc.com/en-gb/2021/10/22/girls-planet-999-winners-top-9-kep1er-out-how-to-pronounce-act-name/|website=HITC|language=en-GB|last=Adhya|first=Arpita|date=October 22, 2021|access-date=September 11, 2022|archive-date=September 14, 2022|archive-url=https://web.archive.org/web/20220914003710/https://www.hitc.com/en-gb/2021/10/22/girls-planet-999-winners-top-9-kep1er-out-how-to-pronounce-act-name/|url-status=live}}

{{Main|Girls Planet 999}}

Kep1er was formed through the Mnet reality survival show Girls Planet 999, which aired from August 6 to October 22, 2021. The show brought 99 contestants from China, Japan, and South Korea to compete to debut in a multinational girl group.{{Cite web|title='걸스플래닛999', 8월 첫 방송 확정→여진구 MC 발탁|trans-title='Girls Planet 999' first broadcast confirmed in August → Yeo Jin-goo selected as MC|url=http://www.topstarnews.net/news/articleView.html?idxno=12690764|website=Top Star News|language=ko|last=Kim|first=Hyo-jin|date=June 8, 2021|access-date=July 7, 2021|archive-date=October 9, 2021|archive-url=https://web.archive.org/web/20211009045553/http://www.topstarnews.net/news/articleView.html?idxno=12690764|url-status=live}} Out of initially 99 contestants, only the top nine would make the final lineup.{{Cite web|title=Mnet '걸스플래닛999' 8월 6일 첫방 확정|trans-title='Girls Planet 999' first aired on August 6th confirmed|url=https://www.mk.co.kr/star/broadcasting-service/view/2021/07/650466/|website=Star Today|language=ko|last=Park|first=Se-yeon|date=July 6, 2021|access-date=July 7, 2021|archive-date=October 26, 2021|archive-url=https://web.archive.org/web/20211026085315/https://www.mk.co.kr/star/broadcasting-service/view/2021/07/650466/|url-status=live}}

Before the show began, several group members had already been active in the entertainment industry. Choi Yu-jin made her debut in the Cube Entertainment girl group CLC on March 19, 2015, with the group's extended play (EP) First Love; she was on hiatus from CLC due to activities with Kep1er until their disbandment.{{cite web|title=큐브 新걸그룹 씨엘씨 '비율종결자' 최유진 프로필 공개|trans-title='Cube's new girl group CLC's 'Ratio Finalist' Choi Yoo-jin's profile revealed|url=https://www.starnewskorea.com/stview.php?no=2015031310224714859|website=Star News|language=ko|date=March 13, 2015|access-date=October 22, 2021|archive-date=October 22, 2021|archive-url=https://web.archive.org/web/20211022161844/https://star.mt.co.kr/stview.php?no=2015031310224714859&type=1&outlink=1|url-status=live}} In 2010, Kang Ye-seo was a member of the girl group CutieL before joining Busters from 2019 to 2020.{{Cite web|title=2005년생 예서 버스터즈 새 멤버, "10년째 아역배우로 활동"|trans-title=New member of Busters, Yeseo born in 2005, "Active as a child actor for 10 years"|url=http://bntnews.hankyung.com/apps/news?popup=0&nid=04&c1=04&c2=04&c3=00&nkey=201902011205393&mode=sub_view|website=bntnews.hankyung.com|access-date=February 1, 2019|archive-date=February 2, 2019|archive-url=https://web.archive.org/web/20190202042644/http://bntnews.hankyung.com/apps/news?popup=0&nid=04&c1=04&c2=04&c3=00&nkey=201902011205393&mode=sub_view|url-status=live}}

Kim Da-yeon participated in Produce 48 in 2018, representing CNC Entertainment,{{Cite web|title=[포토] 프로듀스 48 출연 연습생 김다연 (PRODUCE 48)|trans-title=[Photo] Produce 48 trainee Dayeon Kim (PRODUCE 48)|url=https://www.ajunews.com/view/20180615180045272|website=Ajou Economy|language=ko|last=Yoo|first=Dae-gil|date=June 16, 2018|access-date=January 2, 2022|archive-date=January 2, 2022|archive-url=https://web.archive.org/web/20220102093040/https://www.ajunews.com/view/20180615180045272|url-status=live}} while Shen Xiaoting participated in Produce Camp 2020, representing Top Class Entertainment. Both were eliminated in the first round, placing 70th and 80th in their respective shows. Mashiro Sakamoto, a trainee at JYP Entertainment from 2016 to 2018,{{Cite web|title=JYP 출신 사카모토 마시로, '걸스플래닛999' 등장...선미 극찬|url=https://www.edaily.co.kr/news/read?newsId=01177526629145024&mediaCodeNo=258|website=EDaily|language=ko|last=Kim|first=Hyun-sik|date=August 7, 2021|access-date=January 3, 2022|archive-date=January 3, 2022|archive-url=https://web.archive.org/web/20220103101727/https://www.edaily.co.kr/news/read?newsId=01177526629145024&mediaCodeNo=258|url-status=live}} appeared in the first episode of the Mnet reality survival show Stray Kids as part of the female trainee team, but did not progress past the first episode. Following Produce 48, Da-yeon left CNC Entertainment and signed with Stardium Entertainment, only to leave once more after her debut plans fell through.{{cite web|title=2021-10-22 Episode 12, Completion Mission! Last battle for the TOP9|url=https://www.iq.com/play/girls-planet-999-2021-10-22-17tvei5cguw?lang=en_us|website=iqiyi|date=October 22, 2021|access-date=January 3, 2022|ref=13:36|archive-date=January 3, 2022|archive-url=https://web.archive.org/web/20220103084752/https://www.iq.com/play/girls-planet-999-2021-10-22-17tvei5cguw?lang=en_us|url-status=live}} Xiaoting was a competitive ballroom and modern dancer, having won a gold medal in a modern dance sport competition in Shanghai, as well as ranking sixth globally in a British competition.{{cite web|title=2021-08-06 Phase 1, Yeo Jin-goo navigates! The girls' first stage stun the audience|url=https://www.iq.com/play/girls-planet-999-2021-8-6-o1ewubywr0?lang=en_us|website=iQiyi|date=August 6, 2021|access-date=January 3, 2022|ref=46:43|archive-date=January 3, 2022|archive-url=https://web.archive.org/web/20220103084752/https://www.iq.com/play/girls-planet-999-2021-8-6-o1ewubywr0?lang=en_us|url-status=live}}

Kep1er was originally scheduled to debut on December 14, 2021, with pre-orders for their EP First Impact having begun on November 29.{{Cite web|title=Kep1er The 1st Mini Album 'FIRST IMPACT' 앨범 예약 판매 안내(211203 ver.)|url=https://cafe.daum.net/kep1er.offcl/Y1Tv/4|website=Daum|language=ko, ja, Chinese, en|date=November 29, 2021|access-date=December 13, 2021|archive-date=December 1, 2021|archive-url=https://web.archive.org/web/20211201223813/http://cafe.daum.net/kep1er.offcl/Y1Tv/4|url-status=live}} They were also initially scheduled to perform at the 2021 Mnet Asian Music Awards on December 11.{{Cite web|title=2021 MAMA, 에스파→TXT 12팀 최종 라인업 공개|url=https://entertain.naver.com/read?oid=108&aid=0003007489|website=Naver|date=November 25, 2021|access-date=January 22, 2022|archive-date=December 11, 2021|archive-url=https://web.archive.org/web/20211211121503/https://entertain.naver.com/read?oid=108&aid=0003007489|url-status=live}} However, it was announced that the group's scheduled debut had been delayed to January 3, 2022, after one of their staff members tested positive for COVID-19.{{Cite news|title=케플러, 데뷔 연기...스태프 코로나 확진 여파|url=https://entertain.naver.com/read?oid=003&aid=0010871513|work=Newsis via Naver|language=ko|author=Choi Ji-yoon|date=December 5, 2021|access-date=December 5, 2021|archive-date=December 5, 2021|archive-url=https://web.archive.org/web/20211205080439/https://entertain.naver.com/read?oid=003&aid=0010871513|url-status=live}}{{Cite news|title=케플러, 내년 1월3일 데뷔...'2021 MAMA' 출연 취소|trans-title=Kep1er to debut on January 3 next year... Cancellation of '2021 MAMA' appearance|url=https://entertain.naver.com/read?oid=003&aid=0010878766|work=Newsis via Naver|language=ko|author=Lee Jae-hoon|date=December 8, 2021|access-date=December 8, 2021|archive-date=December 8, 2021|archive-url=https://web.archive.org/web/20211208104220/https://entertain.naver.com/read?oid=003&aid=0010878766|url-status=live}} Their performance at the 2021 Mnet Asian Music Awards was also cancelled.{{Cite web|title=[전문] 케플러, 데뷔 연기...현장 스태프 코로나 확진 여파|url=https://entertain.naver.com/now/read?oid=144&aid=0000778915|website=Naver|date=December 5, 2021|access-date=January 22, 2022|archive-date=December 6, 2021|archive-url=https://web.archive.org/web/20211206070848/https://entertain.naver.com/now/read?oid=144&aid=0000778915|url-status=live}} On December 14, it was revealed that group members Mashiro and Xiaoting tested positive for COVID-19{{Cite web|title=Kep1er 코로나19 확진 관련 안내|trans-title=Kep1er information on COVID-19 confirmation|url=https://cafe.daum.net/_c21_/bbs_read?grpid=1ZBuS&fldid=Y1Tv&datanum=11|website=Daum|language=ko|date=December 14, 2021|access-date=December 14, 2021|archive-date=December 14, 2021|archive-url=https://web.archive.org/web/20211214074213/https://cafe.daum.net/_c21_/bbs_read?grpid=1ZBuS&fldid=Y1Tv&datanum=11|url-status=live}} and were announced to have fully recovered on December 26.{{Cite web|title=케플러, 샤오팅‧마시로 코로나19 완치→1월 3일 데뷔 프로모션 재개[공식]|trans-title=Kep1er, Xiaoting and Mashiro recover from Corona 19 → Debut promotion resumes on January 3 [Official]|url=https://entertain.naver.com/now/read?oid=477&aid=0000335036|website=Spotv News|language=ko|last=Kim|first=Won-kyum|date=November 26, 2021|access-date=November 26, 2021|archive-date=December 26, 2021|archive-url=https://web.archive.org/web/20211226104419/https://entertain.naver.com/now/read?oid=477&aid=0000335036|url-status=live}}

File:Kep1er at the Uni-kon Music Festival on July 3, 2022.jpg

On January 3, 2022, Kep1er released their debut EP First Impact, with "Wa Da Da" serving as lead single.{{Cite web|title=케플러 '2022년 최대 기대주'[★포토]|trans-title=Kepler 'the most anticipated stock in 2022' [Photo]|url=https://www.starnewskorea.com/stview.php?no=2022010317564672623|website=Star News|language=ko|last=Im|first=Seong-gyun|date=January 3, 2022|access-date=January 3, 2022|archive-date=January 3, 2022|archive-url=https://web.archive.org/web/20220103094541/https://star.mt.co.kr/stview.php?no=2022010317564672623|url-status=live}}{{Cite news|title='걸스플래닛' 출신 케플러 "우리 강점은 퍼포먼스와 에너지"|trans-title=Kepler from 'Girls Planet' "Our strengths are performance and energy"|url=https://www.yna.co.kr/view/AKR20220103158300005|newspaper=Yonhap News Agency|language=ko|last=Lee|first=Tae-soo|date=January 3, 2022|access-date=January 3, 2022|archive-date=January 3, 2022|archive-url=https://web.archive.org/web/20220103091951/https://www.yna.co.kr/view/AKR20220103158300005|url-status=live}} On January 10, Chaehyun was announced as the new co-host for SBS MTV's music program The Show alongside Ateez's Yeosang and Cravity's Minhee.{{cite web|title=[단독]케플러 김채현, '더쇼' 새 MC 확정..'걸스플래닛999' 1위의 대세 행보|trans-title=[Exclusive] Kepler Kim Chae-hyun, 'The Show' new MC confirmed...'Girls Planet 999' trending trend|url=https://n.news.naver.com/entertain/article/109/0004538954|via=Naver|publisher=Osen|language=ko|last=Lee|first=Seung-hoon|date=January 10, 2022|access-date=January 11, 2022|archive-date=January 10, 2022|archive-url=https://web.archive.org/web/20220110063454/https://n.news.naver.com/entertain/article/109/0004538954|url-status=live}} On January 13, Kep1er won their first music program award on M Countdown with "Wa Da Da".{{Cite web|title='엠카' 케플러, 아이브 제치고 1위...민호·효린 컴백[종합]|trans-title='Mcar' Kepler overtakes Ive for 1st place...Minho and Hyorin comeback [Overall]|url=https://entertain.naver.com/read?oid=109&aid=0004540956|via=Naver|publisher=Osen|language=ko|last=Kim|first=Bo-ra|date=January 13, 2022|access-date=January 13, 2022|archive-date=January 13, 2022|archive-url=https://web.archive.org/web/20220113112924/https://entertain.naver.com/read?oid=109&aid=0004540956|url-status=live}} On February 21, 2022, it was confirmed that Kep1er will participate in the second season of the Mnet reality competition show Queendom, scheduled to premiere in March 2022.{{Cite web|title='퀸덤2' 출연자 공개...브브걸-비비지-이달소-우소-효린-케플러|trans-title='Queendom 2' cast revealed... Brave Girls - Viviz - Loona - WJSN - Hyolyn - Kep1er|url=https://entertain.naver.com/read?oid=382&aid=0000962268|via=Naver|publisher=Sports Donga|language=ko|last=Jeong|first=Hee-yeon|date=February 21, 2022|access-date=February 21, 2022|archive-date=February 21, 2022|archive-url=https://web.archive.org/web/20220221032344/https://entertain.naver.com/read?oid=382&aid=0000962268|url-status=live}} On June 20, Kep1er released their second EP Doublast, with "Up!" serving as the lead single.{{Cite web|title=케플러, 20일 미니 2집 'DOUBLAST'로 컴백 [공식입장]|trans-title=Kepler, comeback with the 2nd mini album 'DOUBLAST' on the 20th [Official Position]|url=https://n.news.naver.com/entertain/now/article/311/0001457054|via=Naver|publisher=Xports News|language=ko|last=Kim|first=No-eul|date=June 3, 2022|access-date=June 3, 2022|archive-date=June 3, 2022|archive-url=https://web.archive.org/web/20220603045531/https://n.news.naver.com/entertain/now/article/311/0001457054|url-status=live}} On August 3, Kep1er released their first Japanese single Fly-Up, featuring "Wing Wing" as lead track.{{Cite web|title=日本デビューシングルのタイトル曲「Wing Wing」先行配信がスタート!そしてMVも公開!|url=https://kep1er.jp/news/sp62e927084003f42be100578d|website=Kep1er Japan Official|language=Japanese|date=August 2, 2022|access-date=September 8, 2022|archive-date=September 8, 2022|archive-url=https://web.archive.org/web/20220908124310/https://kep1er.jp/news/sp62e927084003f42be100578d|url-status=live}} It was released on September 7, 2022.{{Cite web|title=|script-title=ja:9/7(水) Kep1er Japan 1st Singleで日本デビュー決定!|url=https://kep1er.jp/news/sp62d88da04003f42be1005597|website=Kep1er Japan Official|language=ja|date=July 20, 2022|access-date=July 20, 2022|archive-date=September 20, 2022|archive-url=https://web.archive.org/web/20220920170607/https://kep1er.jp/news/sp62d88da04003f42be1005597|url-status=live}} On September 23, Kep1er released the promotional single "Sugar Rush" through Universe Music.{{Cite web|title=|script-title=ko:케플러, 유니버스와 신곡 'Sugar Rush' 과즙美 팡팡|trans-title=Kepler, Universe and New Song 'Sugar Rush' Juicy Beauty|url=https://news.jtbc.co.kr/article/article.aspx?news_id=NB12078414|website=JTBC News|language=Korean|last=황|first=소영|date=September 18, 2022|access-date=September 21, 2022|archive-date=September 21, 2022|archive-url=https://web.archive.org/web/20220921153845/https://news.jtbc.co.kr/article/article.aspx?news_id=NB12078414|url-status=live}} On October 13, Kep1er released their third EP Troubleshooter, with "We Fresh" serving as the lead single.{{Cite web|title="거침없이 싸워"..케플러, 걸스 히어로들의 'We Fresh' [6시★살롱]|trans-title="Fight without hesitation"..Kepler, Girl's Heroes' 'We Fresh' [6 o'clock Salon]|url=https://entertain.naver.com/read?oid=108&aid=0003096023|via=Naver|publisher=Star News|language=ko|last=Choi|first=Hye-jin|date=October 13, 2022|access-date=October 13, 2022|archive-date=October 13, 2022|archive-url=https://web.archive.org/web/20221013093923/https://entertain.naver.com/read?oid=108&aid=0003096023|url-status=live}}

On February 14, 2023, WakeOne and Swing Entertainment announced the dates for Kep1er Japan Concert Tour 2023 'Fly-By', which were held in Aichi and Hyogo, the first time that the group held a Japanese arena tour since their debut.{{cite web|title=케플러, 데뷔 후 첫 日 아레나 투어 확정..뜨거운 현지 인기|trans-title='Kep1er confirms first Japanese arena tour after debut... hot local popularity|url=https://entertain.naver.com/now/read?oid=112&aid=0003614932|via=Naver|publisher=Herald Pop|language=ko|last=Kim|first=Nayul|date=February 14, 2023|access-date=June 11, 2023|archive-date=March 2, 2023|archive-url=https://web.archive.org/web/20230302231250/https://entertain.naver.com/now/read?oid=112&aid=0003614932|url-status=live}} On March 15, Kep1er released their second Japanese single Fly-By, with "I Do! Do You?" as the lead track.{{Cite web|title=3月15日(水)にJapan 2nd Single 発売決定!ビジュアル/商品詳細を公開!|trans-title=Japan 2nd single will be released on March 15th (Wednesday)! Visual / product details released!|url=https://kep1er.jp/news/sp63c13438f731174613e45d75|website=kep1er.jp|language=ja|date=January 16, 2023|access-date=January 16, 2023|archive-date=January 15, 2023|archive-url=https://web.archive.org/web/20230115220222/https://kep1er.jp/news/sp63c13438f731174613e45d75|url-status=live}} On April 10, The group released their fourth EP Lovestruck!, with "Giddy" as the lead single.{{cite web|title=케플러, 4월10일 새 앨범 발매...6개월 만에 컴백|trans-title=Kepler releases new album on April 10th... comeback after 6 months|url=https://entertain.naver.com/now/read?oid=421&aid=0006659537|via=Naver|publisher=News1|language=ko|last=Kim|first=Min-ji|date=March 2, 2023|access-date=March 2, 2023|archive-date=November 12, 2020|archive-url=https://web.archive.org/web/20201112034656/https://entertain.naver.com/now/read?oid=421&aid=0006659537|url-status=live}}{{cite web|title='러브 스트럭' 케플러, 4월 10일 컴백|trans-title='Lovestruck' Kep1er, April 10 Comeback|url=https://entertain.naver.com/now/read?oid=396&aid=0000639193|via=Naver|publisher=Sportsworld|language=ko|last=Jeong|first=Ga-young|date=March 20, 2023|access-date=March 20, 2023|archive-date=May 11, 2023|archive-url=https://web.archive.org/web/20230511020947/https://entertain.naver.com/now/read?oid=396&aid=0000639193|url-status=live}} Kep1er successfully carried out their concert tour by performing in Tokyo at Yoyogi National Stadium on May 20–21, Aichi Sky Expo on June 2–3 and at Kobe World Memorial Hall in Kobe on June 10–11.{{cite web|title=케플러, 첫 日 아레나 투어 도쿄 공연 성료|trans-title='Kep1er successfully completed its first Japanese arena tour in Tokyo|url=https://www.mk.co.kr/star/hot-issues/view/2023/05/388870/|via=Maeil Business Newspaper|publisher=StarToday|language=ko|date=May 22, 2023|access-date=June 11, 2023|archive-date=June 11, 2023|archive-url=https://web.archive.org/web/20230611103554/https://www.mk.co.kr/star/hot-issues/view/2023/05/388870/|url-status=live}} On July 6, Kep1er released the promotional single "Rescue Tayo" in collaboration with the YouTube children animation channel Tayo the Little Bus.{{Cite web|title=걸그룹 케플러, 꼬마버스 타요와 전격 콜라보|trans-title=Collaboration with girl group Kep1er and Tayo the Little Bus|url=https://entertain.naver.com/read?oid=117&aid=0003748028|via=Naver|website=My Daily|language=ko|last=Seung-rok|first=Lee|date=July 6, 2023|access-date=September 1, 2023|archive-date=September 1, 2023|archive-url=https://web.archive.org/web/20230901071449/https://entertain.naver.com/read?oid=117&aid=0003748028|url-status=live}} On September 25, the group released their fifth EP Magic Hour, with "Galileo" as the lead single.{{Cite web|title=케플러, 9월 25일 컴백...'매직 아워' 티저|trans-title=Kepler, comeback on September 25th... Teaser for 'Magic Hour'|url=https://entertain.naver.com/read?oid=382&aid=0001071974|via=Naver|website=Sports Donga|language=ko|last=Hyo-jin|first=Jeon|date=August 30, 2023|access-date=August 30, 2023|archive-date=August 30, 2023|archive-url=https://web.archive.org/web/20230830010658/https://entertain.naver.com/read?oid=382&aid=0001071974|url-status=live}} On November 22, the group released their third Japanese single Fly-High, with "Grand Prix" as the lead track.{{Cite web|title=11月22日(水)発売、Kep1er Japan 3rd Single 購入特典が決定!|trans-title=Kep1er Japan 3rd Single released on November 22nd (Wednesday) Purchase benefits have been decided!|url=https://kep1er.jp/news/sp6524a437109e08bfe120dc6e|website=kep1er.jp|language=ja|date=October 10, 2023|access-date=October 10, 2023|archive-date=October 10, 2023|archive-url=https://web.archive.org/web/20231010154949/https://kep1er.jp/news/sp6524a437109e08bfe120dc6e|url-status=live}}

File:Kep1er leaving for promotions in Japan through Gimpo International Airport on November 19, 2023.jpg

In 2024, Kep1er held their second Japanese concert tour titled Kep1er Japan Concert Tour 2024 'Fly-High' in Chiba at the Makuhari Event Hall on February 23–24, and in Kobe at the Kobe World Memorial Hall on March 2–3.{{Cite web|title=케플러, 데뷔 첫 日 팬 콘서트 성공적 마무리...3만명 동원|trans-title=Kep1er successfully concludes their first Japanese fan concert after debut... 30,000 people attended|url=https://entertain.naver.com/read?oid=015&aid=0004955424|via=Naver|publisher=The Korea Economic Daily|language=ko|last=Kim|first=Soo-young|date=March 4, 2024|access-date=March 4, 2024|archive-date=March 4, 2024|archive-url=https://web.archive.org/web/20240304171915/https://entertain.naver.com/read?oid=015&aid=0004955424|url-status=live}} On February 14, WakeOne and Swing Entertainment announced that the group's first Japanese studio album Kep1going would be released on May 8.{{Cite web|title=Kep1er to drop first full-length album 'Kep1going' in Japan|url=https://entertain.naver.com/read?oid=640&aid=0000049955|via=Naver|publisher=Korea JoongAng Daily|last=Cho|first=Yong-jun|date=February 14, 2024|access-date=February 14, 2024|archive-date=February 14, 2024|archive-url=https://web.archive.org/web/20240214172945/https://entertain.naver.com/read?oid=640&aid=0000049955}} Its title track "Straight Line" was released on April 23. On May 13, it was announced that Kep1er would be releasing their first Korean studio album Kep1going On on June 3 with the title track "Shooting Star"{{Cite web|title=케플러, 드디어 첫 정규앨범 발표한다.."6월 3일 컴백" [공식]|trans-title=Kep1er finally releases first full-length album.."Comeback on June 3" [Official]|url=https://m.entertain.naver.com/article/108/0003235136|via=Naver|publisher=Star News|last=Kim|first=Na-ra|date=May 13, 2024|access-date=May 13, 2024|archive-date=May 13, 2024|archive-url=https://web.archive.org/web/20240513153708/https://m.entertain.naver.com/article/108/0003235136|url-status=live}} The song was listed on Dazed's "The 50 best K-pop tracks of 2024"{{Cite web |title=The 50 best K-pop tracks of 2024

|url=https://www.dazeddigital.com/music/article/65706/1/the-50-best-k-pop-tracks-of-2024 |access-date=December 18, 2024 |website=dazeddigital.com |date=December 13, 2024}} and Billboard's "The 25 Best K-Pop Songs of 2024".{{Cite web |title=The 25 Best K-Pop Songs of 2024: Staff Picks

|url=https://www.billboard.com/lists/best-kpop-songs-2024/ |access-date=December 18, 2024 |website=billboard.com |date=December 6, 2024}}

In September 2023, it was reported that WakeOne was discussing the extension of the group's contract with the members' respective agencies beyond the initial two years and six months contract, which if unsuccessful would have led to the group's disbandment in mid-2024.{{Cite web|title=A contract extension for Kep1er is under discussion, says WakeOne|url=https://www.nme.com/en_asia/news/music/contract-extension-kep1er-under-discussion-3502528|website=NME|last=Yeo|first=Gladys|date=September 22, 2023|access-date=September 24, 2023|archive-date=September 24, 2023|archive-url=https://web.archive.org/web/20230924071627/https://www.nme.com/en_asia/news/music/contract-extension-kep1er-under-discussion-3502528|url-status=live}} By January 2024, discussion on renewal of the group members' contracts was reported to still be ongoing. The group's contract was set to expire in July of the same year.{{Cite web|title=케플러 활동 연장 재계약 논의는 계속된다, 남은 기간은 6개월|trans-title=Kep1er activity extension contract renewal discussions continue, remaining period is 6 months|url=https://entertain.naver.com/read?oid=445&aid=0000168930|via=Naver|publisher=MHN Sports|language=ko|last=Kim|first=Tae-hoon|date=January 12, 2024|access-date=March 30, 2024|archive-date=March 30, 2024|archive-url=https://web.archive.org/web/20240330112344/https://entertain.naver.com/read?oid=445&aid=0000168930|url-status=live}} On May 30, WakeOne announced that all members of Kep1er, except Mashiro and Yeseo, renewed their contracts.{{Cite web|title=케플러, 마시로·강예서 제외 7인 재계약...활동 연장 [공식]|trans-title=Kep1er, 7 members, minus Mashiro and Yeseo, renewed their contracts... to extend activity [Official]|url=https://m.entertain.naver.com/article/421/0007571165|via=Naver|publisher=News1|last=Kim|first=Min-ji|date=May 30, 2024|access-date=May 30, 2024|archive-date=May 30, 2024|archive-url=https://web.archive.org/web/20240530013153/https://m.entertain.naver.com/article/421/0007571165|url-status=live}} Mashiro and Yeseo departed from the group after the group's concerts in Yokohama, Japan on July 15.{{Cite web|title=케플러, 9인 체제 종료...강예서·마시로, 아름다운 이별|trans-title=Kep1er, 9-person system ends... Kang Ye-seo and Mashiro, beautiful farewell|url=https://m.entertain.naver.com/article/433/0000106502|via=Naver|publisher=Dispatch|language=ko|last=Kim|first=Ji-ho|date=July 16, 2024|access-date=July 16, 2024|archive-date=July 15, 2024|archive-url=https://web.archive.org/web/20240715165114/https://m.entertain.naver.com/article/433/0000106502|url-status=live}}

On September 30, 2024, Kep1er signed with Klap Entertainment, which will be co-managing the group along with WakeOne.{{Cite web|title=[단독]7인조 된 케플러, 클렙 손 잡았다|trans-title=[Exclusive] 7-member Kep1er joins hands with KLAP|url=https://m.entertain.naver.com/article/477/0000514323|via=Naver|publisher=Spotv News|last=Jang|first=Jin-ri|date=September 30, 2024|access-date=September 30, 2024|archive-date=September 30, 2024|archive-url=https://web.archive.org/web/20240930025705/https://m.entertain.naver.com/article/477/0000514323|url-status=live}} On November 1, Kep1er released their sixth EP Tipi-tap, their first release as a seven-member ensemble.{{Cite web |last=Pyo |first=Kyung-min |date=November 1, 2024 |title=Kep1er thrives after lineup change, embraces new era with 'TIPI-TAP' |url=https://www.koreatimes.co.kr/www/art/2024/11/398_385334.html |access-date=November 1, 2024 |website=The Korea Times}}

On April 30, 2025, Kep1er will release their first Japanese EP, Against The World.{{cite tweet|number=1876101390050693206|script-title=ja:約1年ぶりの日本オリジナル作品 Kep1er Japan 1st EPが発売決定|user=kep1er_jp|date=January 6, 2025|access-date=January 6, 2025|language=ja}}

On February 15, 2022, Kep1er became models for South Korean cosmetics brand S2ND.{{Cite web|title=에스투엔디, 슈퍼루키 케플러 모델 발탁|trans-title=Super rookie Kep1er selected as model for S2ND|url=https://news.naver.com/main/read.naver?mode=LSD&mid=sec&sid1=103&oid=215&aid=0001014669|via=Naver|publisher=Korea Economic TV|language=ko|last=Kim|first=Won-ji|date=February 15, 2022|access-date=February 15, 2022|archive-date=February 15, 2022|archive-url=https://web.archive.org/web/20220215055958/https://news.naver.com/main/read.naver?mode=LSD&mid=sec&sid1=103&oid=215&aid=0001014669|url-status=live}}

• Choi Yu-jin ({{lang|ko|최유진}}) – leader{{Cite web|title='걸스플래닛' 출신 케플러 "우리 강점은 퍼포먼스와 에너지"|trans-title=Kep1er from 'Girls Planet' "Our strengths are performance and energy"|url=https://entertain.naver.com/read?oid=001&aid=0012895419|via=Naver|publisher=Yonhap News Agency|language=ko|last=Lee|first=Tae-soo|date=January 3, 2022|access-date=January 16, 2022|archive-date=January 19, 2022|archive-url=https://web.archive.org/web/20220119154624/https://entertain.naver.com/read?oid=001&aid=0012895419|url-status=live}}
• Shen Xiaoting ({{lang|zh|沈小婷}}; {{lang|ko|션샤오팅}})
• Kim Chae-hyun ({{lang|ko|김채현}})
• Kim Da-yeon ({{lang|ko|김다연}})
• Ezaki Hikaru ({{lang|ja|江崎ひかる}}; {{lang|ko|에자키 히카루}})
• Huening Bahiyyih ({{lang|ko|휴닝바히에}})
• Seo Young-eun ({{lang|ko|서영은}})

• Sakamoto Mashiro ({{lang|ja|坂本舞白}}; {{lang|ko|사카모토 마시로}}){{Efn-ua|Mashiro served as the co-leader of the group before her departure.{{Cite web|title='걸스플래닛999' 케플러 최유진·사카모토 마시로, 라이브 방송에서 리더와 부리더 임명|trans-title='Girls Planet 999' Kep1er Choi Yujin and Sakamoto Mashiro Appointed Leader and Co-leader in Live Broadcast|url=https://entertain.naver.com/read?oid=117&aid=0003556889|via=Naver|publisher=My Daily|language=ko|last=Cheon|first=Joo-young|date=November 19, 2021|access-date=January 16, 2022|archive-date=January 16, 2022|archive-url=https://web.archive.org/web/20220116134745/https://entertain.naver.com/read?oid=117&aid=0003556889|url-status=live}}}}
• Kang Ye-seo ({{lang|ko|강예서}})

{{main|Kep1er discography}}

• Kep1going (2024)
• Kep1going On (2024)

{{Notelist-ua}}

{{Reflist}}

{{Commons and category}}

• {{Official website|1=https://hello-kep1er.com/}}
• {{URL|https://wake-one.com/en/artists/kep1er/|Kep1er}} at WakeOne

{{Kep1er}}

{{Circle Chart Music Awards for Artist of the Year – Digital Music}}

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Category:Girls Planet 999

Category:Musical groups from Seoul

Category:2022 establishments in South Korea

Category:Musical groups established in 2022

Category:Singing talent show winners

Category:South Korean girl groups

Category:K-pop music groups

Category:South Korean dance music groups

Category:South Korean pop music groups

Category:Swing Entertainment artists

Category:WakeOne artists

Category:Ariola Japan artists

Category:Circle Chart Music Award winners