:Thirty-Nine

• Son Ye-jin as Cha Mi-jo, 39 years old, physician and director of Gangnam Dermatology Clinic.{{Cite news |url= https://entertain.naver.com/now/read?oid=609&aid=0000461537 |title= 손예진 '서른, 아홉' 출연확정, 3년만 JTBC 드라마 복귀(공식입장) |trans-title= Son Ye-jin Confirmed to Appear in 'Thirty, Nine', Returning to JTBC Drama after 3 Years (Official Position) |author= Kim Myung-mi |work= Newsen |publisher= Naver |date= June 30, 2021 |access-date= December 6, 2021 |language= ko |archive-date= December 5, 2021 |archive-url= https://web.archive.org/web/20211205182017/https://entertain.naver.com/now/read?oid=609&aid=0000461537 |url-status= live }}
• Shin So-hyun as young Cha Mi-jo.{{cite web|url=https://entertain.naver.com/now/read?oid=609&aid=0000533823|author=Park Soo-in|title=신예 신소현 '서른, 아홉' 캐스팅, 손예진 아역 된다|trans-title=Rookie Shin So-hyeon's 'Thirty, Nine' cast, Son Ye-jin's child role|publisher=Newsen|via=Naver|date=January 17, 2022|access-date=January 17, 2022|language=ko|archive-date=January 17, 2022|archive-url=https://web.archive.org/web/20220117061448/https://entertain.naver.com/now/read?oid=609&aid=0000533823|url-status=live}}
• Jeon Mi-do as Jeong Chan-young, 39 years old, a drama coach.{{Cite news|url=https://entertain.naver.com/now/read?oid=469&aid=0000621680|author=Jung Han-byul|title=손예진·전미도·김지현, 휴먼 로맨스 '서른, 아홉'으로 만난다|trans-title=Son Ye-jin, Jeon Mi-do, and Kim Ji-hyun meet in human romance 'Thirty, Nine'|work=Hankook Ilbo|publisher=Naver|date=August 4, 2021|access-date=December 6, 2021|language=ko|archive-date=November 24, 2021|archive-url=https://web.archive.org/web/20211124040538/https://entertain.naver.com/now/read?oid=469&aid=0000621680|url-status=live}}
• Ha Seon-ho as young Jeong Chan-young.{{Cite news |url= https://n.news.naver.com/entertain/article/609/0000482107 |title= 신예 하선호 '서른, 아홉'으로 브라운관 첫 데뷔, 전미도 아역 된다(공식) |trans-title= Rookie Ha Seon-ho makes his first CRT debut in 'Thirty, Nine', Jeon Mi also becomes a child role (official) |author= Park Soo-in |work= Newsen |publisher= Naver |date= August 24, 2021 |access-date= December 6, 2021 |language= ko |archive-date= December 5, 2021 |archive-url= https://web.archive.org/web/20211205171056/https://n.news.naver.com/entertain/article/609/0000482107 |url-status= live }}
• Kim Ji-hyun as Jang Joo-hee, 39 years old, a cosmetics saleswoman at a department store.{{Cite news |url= https://n.news.naver.com/entertain/article/312/0000493007 |title= [공식]손예진X전미도X김지현 '서른, 아홉' 출연 확정...내년 첫 방송 |trans-title= [Official] Son Ye-jin X Jeon Mi-do X Kim Ji-hyun confirmed to appear in 'Thirty, Nine'... First broadcast next year |author= Jeong Tae-gun |work= Ten Asia |publisher= Naver |date= August 4, 2021 |access-date= December 6, 2021 |language= ko |archive-date= December 5, 2021 |archive-url= https://web.archive.org/web/20211205180136/https://n.news.naver.com/entertain/article/312/0000493007 |url-status= live }}
• Lee Da-yeon as young Jang Joo-hee.{{cite web|url=https://entertain.naver.com/now/read?oid=108&aid=0003020309|author=Ahn Yoon-ji|title=이다연, JTBC '서른, 아홉' 출연..김지현 아역[공식]|trans-title=Da-yeon Lee to appear in JTBC's 'Thirty, Nine'... Child role of Ji-Hyeon Kim [Official]|publisher=Star News|via=Naver|date=January 11, 2022|access-date=January 11, 2022|language=ko|archive-date=January 11, 2022|archive-url=https://web.archive.org/web/20220111102110/https://entertain.naver.com/now/read?oid=108&aid=0003020309|url-status=live}}

• Yeon Woo-jin as Kim Seon-woo, a 39-year-old dermatologist.{{Cite news|url=https://entertain.naver.com/now/read?oid=469&aid=0000622167|title=연우진·이무생·이태환, '서른, 아홉' 합류...손예진 만난다|language=ko|trans-title=Yeon Woo-jin, Lee Mu-saeng, and Lee Tae-hwan join 'Thirty, Nine'... Meet Son Ye-jin|author=Jung Han-buyl|date=August 6, 2021|work=Hankook Ilbo|publisher=Naver|access-date=December 6, 2021|archive-date=December 5, 2021|archive-url=https://web.archive.org/web/20211205181953/https://entertain.naver.com/now/read?oid=469&aid=0000622167|url-status=live}}
• Lee Moo-saeng as Kim Jin-seok, a 42-year-old talent agent.{{Cite news |url= https://n.news.naver.com/entertain/article/312/0000493517 |title= [공식] 이무생, '서른, 아홉' 출연 확정...'부부의 세계' 이후 2년만 |trans-title= [Official] Lee Moo-saeng confirmed to appear in 'Thirty, Nine'... It's been 2 years since 'The World of the Married' |author= Seo Ye-jin |work= Ten Asia |publisher= Naver |date= August 6, 2021 |access-date= December 6, 2021 |language= ko |archive-date= December 5, 2021 |archive-url= https://web.archive.org/web/20211205162442/https://n.news.naver.com/entertain/article/312/0000493517 |url-status= live }}
• Lee Tae-hwan as Park Hyun-joon, a 35-year-old chef and owner of a Chinatown restaurant.{{Cite news |url= https://entertain.naver.com/now/read?oid=052&aid=0001620613 |author= Kim Sung-hyun |title= [단독] 이태환, 손예진·전미도 '서른,아홉' 합류... 연하남 새 계보 잇는다 |trans-title= [Exclusive] Lee Tae-hwan, Son Ye-jin and Jeon Mi-do join 'Thirty Nine'... Younger man inherits new genealogy |work= YTN |publisher= Naver |date= July 29, 2021 |access-date= December 6, 2021 |language= ko |archive-date= December 5, 2021 |archive-url= https://web.archive.org/web/20211205180139/https://entertain.naver.com/now/read?oid=052&aid=0001620613 |url-status= live }}
• Ahn So-hee as Kim So-won, younger sister of Kim Seon-woo, and a pianist.{{Cite news|url=https://entertain.naver.com/now/read?oid=609&aid=0000478601|title=안소희 '서른, 아홉'서 피아니스트로 출연‥손예진과 호흡[공식]|trans-title=Ahn So-hee appeared as a pianist in ‘Thirty, Nine’... Breathing with Son Ye-jin [Official]|author=Bae Hyo-joo|work=Newsen|publisher=Naver|date=August 12, 2021|access-date=December 6, 2021|language=ko|archive-date=November 12, 2020|archive-url=https://web.archive.org/web/20201112002154/https://entertain.naver.com/now/read?oid=609&aid=0000478601|url-status=live}}

• Lee Kan-hee as Mi-jo's mother.
• Kang Mal-geum as Cha Mi-hyun, 44 years old, Mi-jo's older sister, administrator of their clinic.{{cite web|url=https://entertain.naver.com/now/read?oid=421&aid=0005895141|author=Jang Ah-reum|title=강말금, 손예진과 자매된다...'서른, 아홉' 합류|trans-title=Kang Mal-geum and Son Ye-jin become sisters... Joining 'Thirty, Nine|publisher=News1|via=Naver|date=February 10, 2022|access-date=February 10, 2022|language=ko|archive-date=February 10, 2022|archive-url=https://web.archive.org/web/20220210035815/https://entertain.naver.com/now/read?oid=421&aid=0005895141|url-status=live}}
• Yoon Hye-bin as young Cha Mi-hyun.
• Park Ji-il as Professor Cha Yoo-hyeok, Mi-jo's father.{{Cite news |url=https://n.news.naver.com/entertain/article/609/0000543558 |title='서른 아홉' 손예진, 1년 안식년 갖는 이유 "공황장애"[결정적장면] |trans-title='Thirty-nine' Son Ye-jin, the reason for having a one-year sabbatical “panic disorder” [decisive scene] |author=Seo Yuna |work=Newsen |publisher=Naver |date=February 18, 2022 |access-date=February 22, 2022 |language=ko |archive-date=February 22, 2022 |archive-url=https://web.archive.org/web/20220222140849/https://n.news.naver.com/entertain/article/609/0000543558 |url-status=live }}

• Seo Hyun-chul as Chan-young's father.{{Cite news|author=Yoon Seong-Yeol|date=August 12, 2021|title=서현철 '서른, 아홉' 출연..전미도와 부녀 호흡 [공식]|language=ko|trans-title=Seo Hyun-cheol appeared in 'Thirty, Nine'...|work=Star News|publisher=Naver|url=https://n.news.naver.com/entertain/article/108/0002980210|access-date=December 6, 2021|archive-date=December 5, 2021|archive-url=https://web.archive.org/web/20211205171305/https://n.news.naver.com/entertain/article/108/0002980210|url-status=live}}
• Lee Ji-hyun as Chan-young's mother.{{Cite news|url=https://n.news.naver.com/entertain/article/312/0000532423|title=이지현, 전미도와 투닥투닥 현실 모녀 케미...투박하지만 애정 가득 ('서른, 아홉')|trans-title=Lee Ji-hyun and Jeon Mi-do and mother-daughter chemistry in real life... crude but full of affection ('Thirty, Nine')|author=Cha Hye-young|work=Ten Asia|publisher=Naver|date=February 24, 2022|access-date=February 24, 2022|language=ko|archive-date=February 24, 2022|archive-url=https://web.archive.org/web/20220224051216/https://n.news.naver.com/entertain/article/312/0000532423|url-status=live}}

• Nam Gi-ae as Joo-hee's mother.

• Song Min-ji as Kang Seon-joo, 37 years old, Jinseok's wife. She is from a wealthy family and demands to have whatever she wants.{{Cite news |url= https://n.news.naver.com/entertain/article/312/0000495563 |title= [공식] '송혜교 라이벌' 송민지, '서른, 아홉' 강선주 役 확정...손예진·전미도·연우진 호흡 |trans-title= [Official] 'Song Hye-kyo's Rival' Song Min-ji, 'Thirty, Nine' Kang Seon-joo confirmed... Son Ye-jin, Jeon Mi-do, Yeon Woo-jin breathing |author= Seo Ye-jin |work= Ten Asia |publisher= Naver |date= August 19, 2021 |access-date= December 6, 2021 |language= ko |archive-date= December 5, 2021 |archive-url= https://web.archive.org/web/20211205170346/https://n.news.naver.com/entertain/article/312/0000495563 |url-status= live }}
• Oh Se-young as Cho Hye-jin, 27 years old, a graduate student who is Hyun-jun's girlfriend.{{cite web |url= https://entertain.naver.com/now/read?oid=144&aid=0000757962 |author= Ahn Byung-gil |title= 오세영 '서른, 아홉' 합류 [공식] |trans-title= Oh Se-young joins ‘Thirty, Nine’ [Official] |work= Sports Kyunghyang |via= Naver |date= August 26, 2021 |access-date= August 26, 2021 |language= ko |archive-date= March 4, 2022 |archive-url= https://web.archive.org/web/20220304100743/https://entertain.naver.com/now/read?oid=144&aid=0000757962 |url-status= live }}
• Jo Won-hee as Kim Jeong-tak, Kim Seon-woo's father and Kim So-won's adoptive father.{{cite web|url=https://entertain.naver.com/now/read?oid=421&aid=0005945485|author=Park Ha-na|title=서른, 아홉' 손예진, 연우진 父에 보육원 출신 고백...안소희 마음 이해 [RE:TV]|trans-title='Thirty, Nine' Son Ye-jin, Yeon Woo-jin's confession from an orphanage... Understanding Sohee Ahn's heart [RE:TV]|publisher=News1|via=Naver|date=March 4, 2022|access-date=March 4, 2022|language=ko|archive-date=March 4, 2022|archive-url=https://web.archive.org/web/20220304023444/https://entertain.naver.com/now/read?oid=421&aid=0005945485|url-status=live}}
• Seo Ji-young as Lee Kyung-sook, Cha Mi-jo's biological mother.{{cite web|url=https://entertain.naver.com/now/read?oid=144&aid=0000799841|author=Son Bong-seok|title=서른, 아홉' 서지영, 손예진 친모?|trans-title=Thirty, Nine’ Seo Ji-young, Son Ye-jin’s biological mother?|publisher=Sports Kyunghyang|via=Naver|date=March 17, 2022|access-date=March 17, 2022|language=ko|archive-date=March 16, 2022|archive-url=https://web.archive.org/web/20220316200025/https://entertain.naver.com/now/read?oid=144&aid=0000799841|url-status=live}}

• Kim Kwon as an Chan-young's acting student. (Ep. 1).{{cite web|url=https://entertain.naver.com/now/read?oid=109&aid=0004557653|author=Choi Na-young|title=김권, 전미도의 연기 레슨생..시크하고 시니컬한 매력(서른, 아홉)|trans-title=Kim Kwon and Jeon Mi-do's acting lessons... Chic and cynical charm (thirty, nine)|publisher=OSEN|via=Naver|date=February 15, 2022|access-date=February 15, 2022|language=ko|archive-date=February 15, 2022|archive-url=https://web.archive.org/web/20220215020810/https://entertain.naver.com/now/read?oid=109&aid=0004557653|url-status=live}}
• Hwang Bo-reum-byeol as Chan-young's acting student. (Ep. 3).
• Han Soo-ah as Hye-jin's friend (Ep.4).
• Han Bo-reum as an acting student (Ep. 7).
• Im Si-wan as Im Siwan, lead actor in the film within the film, and a former student of Chan-young.{{cite web|url=https://entertain.naver.com/now/read?oid=477&aid=0000347544|author=Kang Hyo-jin|title=[단독]임시완, JTBC '서른, 아홉' 특별출연|trans-title=[Exclusive] Siwan Im to make a special appearance on JTBC's 'Thirty, Nine|publisher=SPOTV News|via=Naver|date=March 17, 2022|access-date=March 17, 2022|language=ko|archive-date=March 17, 2022|archive-url=https://web.archive.org/web/20220317045934/https://entertain.naver.com/now/read?oid=477&aid=0000347544|url-status=live}}{{cite web|url=https://entertain.naver.com/read?oid=109&aid=0004578033|author=Jang Woo-young|title=서른, 아홉' 전미도, 임시완과 먹먹한 사제 케미|trans-title=Thirty, Nine' Jeon Mi-do, Im Si-wan and Priest's chemistry|publisher=OSEN|via=Naver|date=March 24, 2022|access-date=March 24, 2022|language=ko|archive-date=March 24, 2022|archive-url=https://web.archive.org/web/20220324130427/https://entertain.naver.com/read?oid=109&aid=0004578033|url-status=live}}
• Kang Tae-oh as Park Hyun-joon's friend.{{cite web|url=https://entertain.naver.com/now/read?oid=609&aid=0000557259|author=Park Ah-reum|title=강태오가 왜? '서른, 아홉' 특별출연 이유|trans-title=Why is Tae-oh Kang? Reasons for special appearance in 'Thirty, Nine'|publisher=Newsen|via=Naver|date=March 31, 2022|access-date=March 31, 2022|language=ko|archive-date=March 31, 2022|archive-url=https://web.archive.org/web/20220331171857/https://entertain.naver.com/now/read?oid=609&aid=0000557259|url-status=live}}{{cite web|url=https://entertain.naver.com/now/read?oid=109&aid=0004582231|author=Jang Woo-young|title=강태오x이태환, 찐우정...'서른, 아홉' 특급 카메오|trans-title=Tae-oh Kang x Tae-hwan Lee, Woo-jung Jin... 'Thirty, Nine' special cameo|publisher=OSEN|via=Naver|date=March 31, 2022|access-date=March 31, 2022|language=ko|archive-date=March 31, 2022|archive-url=https://web.archive.org/web/20220331170703/https://entertain.naver.com/now/read?oid=109&aid=0004582231|url-status=live}}

In April 2021, it was announced that Son Ye-jin and Jeon Mi-do were in talks to appear inThirty-Nine, a 12-episode mini-series co-produced by Lotte Cultureworks and JTBC Studio.{{Cite web|title=[단독] 손예진, '서른 아홉'으로 드라마 복귀...전미도와 호흡|url=https://www.joynews24.com/view/1358949|access-date=2022-01-14|website=inews24|language=ko|archive-date=January 15, 2022|archive-url=https://web.archive.org/web/20220115062640/https://www.joynews24.com/view/1358949|url-status=live}} Son confirmed her appearance in June 2021, while Jeon and Kim Ji-hyun confirmed in August.{{Cite web|last=Lee|first=Kyung-ho|date=June 30, 2021|title=손예진, '서른, 아홉' 출연 확정..3년만의 JTBC 드라마 복귀[공식]|url=https://star.mt.co.kr/stview.php?no=2021063008124526184|url-status=live|website=Starnews|access-date=January 14, 2022|archive-date=January 14, 2022|archive-url=https://web.archive.org/web/20220114122024/https://star.mt.co.kr/stview.php?no=2021063008124526184}}{{Cite web|last=성정은|title=손예진X전미도X김지현, 파란만장 '서른 아홉' 세 친구|url=https://entertain.naver.com/now/read?oid=009&aid=0004833534|access-date=2022-01-14|website=entertain.naver.com|language=ko|archive-date=January 14, 2022|archive-url=https://web.archive.org/web/20220114122024/https://entertain.naver.com/now/read?oid=009&aid=0004833534|url-status=live}} Thirty-Nine marks Son's return to JTBC after three years; she last appeared in JTBC's 2018 TV series Something in the Rain.{{Cite news|url= https://n.news.naver.com/entertain/article/438/0000036832|title= 손예진, 3년만의 드라마 JTBC '서른, 아홉'|trans-title= Son Ye-jin, drama JTBC 'Thirty, Nine' after 3 years|author= Park Jae-hwan|work= KBS Entertainment|publisher= Naver|date= June 30, 2021|access-date= December 6, 2021|language= ko|archive-date= December 5, 2021|archive-url= https://web.archive.org/web/20211205173039/https://n.news.naver.com/entertain/article/438/0000036832|url-status= live}}

Filming began in August 2021.{{Cite news |url= https://variety.com/2021/global/asia/thirty-nine-korean-drama-series-jtbc-series-mania-1235040114/ |title= Series Mania Hot Project: 'Thirty-Nine' From Korea's JTBC |author= Rebecca Souw |work= Variety |date= August 26, 2021 |access-date= December 6, 2021 |language= en |archive-date= December 5, 2021 |archive-url= https://web.archive.org/web/20211205185107/https://variety.com/2021/global/asia/thirty-nine-korean-drama-series-jtbc-series-mania-1235040114/ |url-status= live }} On January 12, 2022, photos from the script reading were published.{{Cite news|url=https://n.news.naver.com/entertain/now/article/117/0003569030|title='서른, 아홉' 손예진·전미도·김지현, 대본리딩 현장...첫 호흡에 '찐친 케미'|trans-title='Thirty, Nine' Son Ye-jin, Jeon Mi-do, Kim Ji-hyun, script reading site... 'Chemie' in the first breath|author=Jung Ji-hyun|work=My Daily|publisher=Naver|date=January 12, 2022|access-date=January 12, 2022|language=ko|archive-date=February 3, 2022|archive-url=https://web.archive.org/web/20220203185537/https://n.news.naver.com/entertain/now/article/117/0003569030|url-status=live}}

{{Infobox album

| name = Thirty-Nine

| type = Soundtrack

| artist = Various

| released = 2022

| recorded =

| genre = Soundtrack

| language = {{hlist|Korean|English}}

| label = {{hlist|Kakao Entertainment|JTBC Studios}}

}}

{{track listing

| headline = Released on {{start date|2022|2|16}}{{Cite web |url= https://m2.melon.com/album/detail.htm?albumId=10868696 |title= 서른, 아홉 OST Part.1 |trans-title= Thirty-Nine OST Part.1 |website= Melon |access-date= 17 February 2022 |archive-date= February 16, 2022 |archive-url= https://web.archive.org/web/20220216160504/https://m2.melon.com/album/detail.htm?albumId=10868696 |url-status= live }}

| extra_column = Artist

| title1 = Still Here

| note1 = 그때 우리가

| lyrics1 = Kwon Young-chan, Kang Ah-sol

| music1 = Kwon Young-chan

| extra1 = Kang Ah-sol

| length1 = 3:51

| title2 = Still Here

| note2 = Inst.

| music2 = Kwon Young-chan

| length2 = 3:51

}}

{{track listing

| headline = Released on {{start date|2022|2|23}}{{Cite web |url= https://m.app.melon.com/album/detail.htm?albumId=10876228 |title= 서른, 아홉 OST Part.2 |trans-title= Thirty-Nine OST Part.2 |website= Melon |access-date= 23 February 2022 |archive-date= February 23, 2022 |archive-url= https://web.archive.org/web/20220223174358/https://m.app.melon.com/album/detail.htm?albumId=10876228 |url-status= live }}

| extra_column = Artist

| title1 = I Was a Fool

| note1 =

| lyrics1 = Fromm

| music1 = Fromm

| extra1 = Fromm

| length1 = 2:58

| title2 = I Was a Fool

| note2 = Inst.

| music2 =

| length2 = 2:58

}}

{{track listing

| headline = Released on {{start date|2022|3|3}}{{Cite web |url= https://www.melon.com/album/detail.htm?albumId=10882990 |title= 서른, 아홉 OST Part.3 |trans-title= Thirty-Nine OST Part.3 |website= Melon |access-date= March 3, 2022 |archive-date= March 5, 2022 |archive-url= https://web.archive.org/web/20220305021506/https://www.melon.com/album/detail.htm?albumId=10882990 |url-status= live }}

| extra_column = Artist

| title1 = That's All

| note1 = 이것밖에

| lyrics1 = Choi Yu-ree

| music1 = Choi Yu-ree

| extra1 = Choi Yu-ree

| length1 = 4:25

| title2 = That's All

| note2 = Inst.

| music2 =

| length2 = 4:25

}}

{{track listing

| headline = Released on {{start date|2022|3|10}}{{Cite web |url= https://m.app.melon.com/album/detail.htm?albumId=10888427 |title= 서른, 아홉 OST Part.4 |trans-title= Thirty-Nine OST Part.4 |website= Melon |access-date= March 10, 2022 |archive-date= March 10, 2022 |archive-url= https://web.archive.org/web/20220310101442/https://m.app.melon.com/album/detail.htm?albumId=10888427 |url-status= live }}

| extra_column = Artist

| title1 = Peony

| note1 = 꽃말

| lyrics1 = Kwon Young-chan

| music1 = Kwon Young-chan

| extra1 = Car, the Garden

| length1 = 4:05

| title2 = Peony

| note2 = Inst.

| music2 =

| length2 = 4:05

}}

{{track listing

| headline = Released on {{start date|2022|3|17}}{{Cite web|url=https://www.melon.com/album/detail.htm?albumId=10893165|title=서른, 아홉 OST Part.5|trans-title=Thirty-Nine OST Part.5|website=Melon|access-date=17 March 2022|archive-date=March 17, 2022|archive-url=https://web.archive.org/web/20220317131747/https://www.melon.com/album/detail.htm?albumId=10893165|url-status=live}}

| extra_column = Artist

| title1 = In your days

| note1 = 너의 하루 끝에

| lyrics1 = Song Yang-Ha, Kim Jae-hyun, Kyoi

| music1 = Song Yang-Ha, Kim Jae-hyun, Kyoi, Kim Ha-jun

| extra1 = Wheein

| length1 = 3:58

| title2 = In your days

| note2 = Inst.

| music2 = Song Yang-Ha, Kim Jae-hyun, Kyoi, Kim Ha-jun

| length2 = 3:58

}}

{{track listing

| headline = Released on {{start date|2022|3|24}}{{Cite web|url=https://www.melon.com/album/detail.htm?albumId=10898368|title=서른, 아홉 OST Part.6|trans-title=Thirty-Nine OST Part.6|website=Melon|access-date=24 March 2022|archive-date=March 24, 2022|archive-url=https://web.archive.org/web/20220324150710/https://www.melon.com/album/detail.htm?albumId=10898368|url-status=live}}

| extra_column = Artist

| title1 = Did

| note1 = 그랬을까

| lyrics1 = Jung Joon-il

| music1 = Jung Joon-il

| extra1 = Jung Joon-il

| length1 = 3:49

| title2 = Did

| note2 = Inst.

| music2 = Jung Joon-il

| length2 = 3:49

}}

{{Television ratings graph

| title = Thirty-Nine

| refs = Audience measurement performed nationwide by Nielsen KoreaNielsen Korea ratings:

• {{cite web|url=https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220216|title=Ep.1|work=Nielsen Korea|access-date=February 17, 2022|archive-date=February 17, 2022|archive-url=https://web.archive.org/web/20220217003110/http://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220216|url-status=live}}
• {{cite web|url=https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220217|title=Ep.2|work=Nielsen Korea|access-date=February 18, 2022|archive-date=October 2, 2022|archive-url=https://web.archive.org/web/20221002152100/https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220217|url-status=live}}
• {{cite web|url=https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220223|title=Ep.3|work=Nielsen Korea|access-date=February 24, 2022|archive-date=February 24, 2022|archive-url=https://web.archive.org/web/20220224011504/https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220223|url-status=live}}
• {{cite web|url=https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220224|title=Ep.4|work=Nielsen Korea|access-date=February 25, 2022|archive-date=February 25, 2022|archive-url=https://web.archive.org/web/20220225010307/https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220224|url-status=live}}
• {{cite web|url=https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220302|title=Ep.5|work=Nielsen Korea|access-date=March 3, 2022|archive-date=March 3, 2022|archive-url=https://web.archive.org/web/20220303024817/https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220302|url-status=live}}
• {{cite web|url=https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220303|title=Ep.6|work=Nielsen Korea|access-date=March 4, 2022|archive-date=March 4, 2022|archive-url=https://web.archive.org/web/20220304015439/https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220303|url-status=live}}
• {{cite web|url=https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220316|title=Ep.7|work=Nielsen Korea|access-date=March 17, 2022|archive-date=October 2, 2022|archive-url=https://web.archive.org/web/20221002155915/https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220316|url-status=live}}
• {{cite web|url=https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220317|title=Ep.8|work=Nielsen Korea|access-date=March 20, 2022|archive-date=March 20, 2022|archive-url=https://web.archive.org/web/20220320063424/https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220317|url-status=live}}
• {{cite web|url=https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220323|title=Ep.9|work=Nielsen Korea|access-date=March 24, 2022|archive-date=March 24, 2022|archive-url=https://web.archive.org/web/20220324014646/https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220323|url-status=live}}
• {{cite web|url=https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220324|title=Ep.10|work=Nielsen Korea|access-date=March 25, 2022|archive-date=October 2, 2022|archive-url=https://web.archive.org/web/20221002162059/https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220324|url-status=live}}
• {{cite web|url=https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220330|title=Ep.11|work=Nielsen Korea|access-date=March 31, 2022|archive-date=March 31, 2022|archive-url=https://web.archive.org/web/20220331171044/https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220330|url-status=live}}
• {{cite web|url=https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220330|title=Ep.11|work=Nielsen Korea|access-date=March 31, 2022|archive-date=March 31, 2022|archive-url=https://web.archive.org/web/20220331171044/https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220330|url-status=live}}
• {{cite web|url=https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220331|title=Ep.12|work=Nielsen Korea|access-date=April 1, 2022|archive-date=March 31, 2022|archive-url=https://web.archive.org/web/20220331234415/https://www.nielsenkorea.co.kr/tv_terrestrial_day.asp?menu=Tit_1&sub_menu=2_1&area=00&begin_date=20220331|url-status=live}}

| average = y

| width = 400

| height = 250

| country = South Korea

| -

| 1.052

| 1.193

| 1.623

| 1.614

| 1.086

| 1.401

| 1.210

| 1.520

| 1.379

| 1.546

| 1.314

| 1.714

| 1.387

}}

{{notelist}}

{{Reflist}}

• {{Official website}} {{in lang|ko}}
• {{Production website|url=https://www.jtbcstudios.com/works/scripted/view/247|at=JTBC Studios|link=yes|lang=ko}}
• {{IMDb title}}
• {{HanCinema drama}}

{{SLL (South Korean company)}}

Category:JTBC television dramas

Category:2022 South Korean television series debuts

Category:2022 South Korean television series endings

Category:Television series by SLL

Category:South Korean romance television series

Category:Korean-language Netflix exclusive international distribution programming