Director
Executive Producer
Screenwriter
Main Role
- Park Min Young Main Role
- Seo Kang Joon Main Role
Support Role
- Lee Jae WookLee Jang Woo [Eun Seob's friend]Support Role
- Kim Hwan HeeIm Hwi [Eun Seob's sister]Support Role
- Moon Jung HeeShim Myung Yeo [Hae Won's aunt]Support Role
- Im Se MiKim Bo Young [Hae Won's former friend]Support Role
- Jin Hee KyungShim Myung Joo [Hae Won's mother]Support Role
- Nam Ki AeYoon Yeo Jung [Eun Seob's mother]Support Role
- Kang Shin IlIm Jong Pil [Eun Seob's father]Support Role
- Lee Seon HeeChoi Soo Jung [Myung Yeo's friend]Support Role
- Choo Ye JinKwon Hyun Ji [Hwi's friend]Support Role
- Lee Tae HyungBae Geun Sang [Goodnight book club member]Support Role
- Han Chang MinJung Seung Ho [Goodnight book club member]Support Role
- Lee Young SukJung Gil Bok [Seung Ho's grandfather]Support Role
- Hwang GeonCha Yoon Taek [Editor / Myung Yeo's ex-boyfriend]Support Role
- Kim Dae GeonKim Young Soo [Hwi's crush]Support Role
- Yang Hye JiJi Eun Shil [Jang Woo's first love]Support Role
- Lee Bong RyunJang Ha Nim [Pharmacist]Support Role
- Shin Hyun Jong[Village chief]Support Role
- Choi Yun SeolJi Yun [High school alumnus]Support Role
- Park Han SolJoo Hee [Bo Yeong's classmate]Support Role
- Lee Ha EumKim Sul AhSupport Role
- Gu Bon JinInspector Kim (Ep. 15)Support Role
Guest Role
- Gu Da SongNa Gyung [Cello student] (Ep. 1)Guest Role
- Noh Jae HoonPark Joong Hee [High school alumnus] (Ep. 1, 6)Guest Role
- Yoon Ji HyeChoi Ji Young [High school alumnus] (Ep. 1, 6)Guest Role
- Moon Yong IlYoon Jo [High school alumnus] (Ep. 1, 6)Guest Role
- Kim Young Sun[Na Gyeong's mother] (Ep. 1)Guest Role
- Lee Yoo Jung[Music Institute owner] (Ep. 1)Guest Role
- Seo Dong Oh[High school alumnus] (Ep. 1, 16)Guest Role
- Cha Yoo Joo[High school alumnus] (Ep. 1, 6)Guest Role
- Park Seo KyungMok Hae Won [Young] (Ep. 2, 11-12, 14)Guest Role
- Lee Young RanYoon Hye Ja [Hae Won's grandmother] (Ep. 2, 3, 5, 12)Guest Role
- Uhm Hye Soo[Hae Won's classmate] (Ep. 2-3)Guest Role
- Park Jung EonKim Jung Eun [Judge] (Ep. 3, 5, 12)Guest Role
- Im Yu Ran[Student's mother] (Ep. 3)Guest Role
- Choi Ji YeonJi Yeon [City Hall employee] (Ep. 4, 11, 14)Guest Role
- Park Ji WonChoi Min Jung [City hall employee] (Ep. 4, 9)Guest Role
- Ahn Soo Ho[Jang Woo's boss] (Ep. 4, 7, 14)Guest Role
- Lee Se Rang[City Hall employee] (Ep. 4, 11, 14)Guest Role
- Jeon Yu LimShim Myung Joo [Young] (Ep. 5)Guest Role
- Yoon Sang HwaPark Hin Dol [Century Seorim bookstore] (Ep. 5-6, 9, 16)Guest Role
- Seo Tae HwaMok Joo Hong [Hae Won's father] (Ep. 5, 11-12, 15)Guest Role
- Ok Chan YuIm Eun Seob / Kim Jin Ho [Young] (Ep. 5, 8-10)Guest Role
- Jung Nan Hee[Florist] (Ep. 5, 13-14)Guest Role
- Jun Eun Mi[Prison officer] (Ep. 5)Guest Role
- Kim Young DaeOh Young Woo [High school alumnus / Barista] (Ep. 5, 6, 16)Guest Role
- Kim Hong BinShim Myung Yeo [Young] (Ep. 6, 8, 11)Guest Role
- Kim Hye Hwa[Kim Jin Ho's mother] (Ep. 7-8, 10)Guest Role
- Kim Chae Hyun[Bo Young's co-worker] (Ep. 7)Guest Role
- Jeon Yeong InBo Gook (Ep. 8)Guest Role
- Ahn Dong GooCha Yoon Taek [Young] (Ep. 8, 11)Guest Role
- Oh Ja HunLee Jang Woo [Young] (Ep. 9)Guest Role
- Kim Na MiShin Young Chun [Author] (Ep. 9, 11, 13)Guest Role
- Kang Jin HwiGil Dong [Eun Seob's Uncle] (Ep. 9-10)Guest Role
- Yoo Joo Won[School kid who teases Eun Sub] (Ep. 9)Guest Role
- Shin Young Kyu[Waiter] (Ep. 10)Guest Role
- Keum Dong Hyun[Billiard Hall owner] (Ep. 10)Guest Role
- Lee Seo AnJo Young Mi [Jang Woo's blind date] (Ep. 11)Guest Role
- Uhm Tae Ok[Mourner] (Ep. 11)Guest Role
- Yoo Soon Woong[Bookstore landlord] (Ep. 11)Guest Role
- Bae Min Jun[Teenager on bench] (Ep. 12)Guest Role
- Yoon Boo Jin[Friend of Bo Young's mother] (Ep. 13)Guest Role
- Oh Se EunSong Je In [Young Soo's classmate] (Ep. 14-15)Guest Role
- Choi Chung Ja[Villager] (Ep. 14)Guest Role
- Kim Bi Bi[Ophthalmologist] (Ep. 14)Guest Role
- Jeon Young[Ji Eun Shil’s mother] (Ep. 14)Guest Role
- Kim Nu RimIm Hwi [Transfer student] (Ep. 16)Guest Role
- Park In Chun[Journalist] (Ep. 16)Guest Role
- Hong Boo Hyang[Mi Yeon's mother] (Ep. 16)Guest Role
- Ahn So Ye[Village kid]Guest Role
- Shin Dong Hoon[City Hall employee]Guest Role
- Seo Han Sol[Young Woo's friend]Guest Role
- Kim Yun Jeong[High School student]Guest Role
- Yoo Ok Joo[Kim Bo Young's mother]Guest Role
- Yoon FelixPark Hin Dol [Young]Guest Role
Unknown
- Shin Hye Ji Unknown
- Kim Hye Ji Unknown
- Son Sang Bin Unknown
- Han Ji Won Unknown
- Park Seo Bin Unknown
- Min Chae Min Unknown
- Kang Sung Chan Unknown
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