Composer
Director
Original Creator
Screenwriter
Main Role
- Kim Hye Yoon Main Role
- Ro Woon Main Role
- Lee Jae Wook Main Role
- Lee Na Eun Main Role
- Kim Young Dae Main Role
- Jung Gun Joo Main Role
Support Role
- Kim Ji InShin Sae Mi [Dan Oh's best friend]Support Role
- Kim Hyun MokAhn Soo Chul [Dan Oh's friend]Support Role
- Jung Ye NokKim Il Jin [Dan Oh's classmate]Support Role
- Jung Yeo JinLee Sam Jin [Dan Oh's classmate]Support Role
- Han Chae KyungKim Ae Il [Dan Oh's classmate]Support Role
- Kang Na RooLee Ae Sam [Dan Oh's classmate]Support Role
- Jung Dae RoKim Yang Il [Dan Oh's classmate]Support Role
- Yoon Jong BinLee Yang Sam [Dan Oh's classmate]Support Role
- Jo Deok HeeKim Ban Jang [Class President]Support Role
- Oh Jong MinKim Bo Dong [Dan Oh's classmate]Support Role
- Kim Joon SungPark Mo Bum / "Bible"Support Role
- Shin Yong HoShin Ba Ram [Dan Oh's classmate]Support Role
- Heo Soo BinWang Bit Na [Dan Oh's classmate]Support Role
- Jung Ji HyunHan Soo Da [Dan Oh's classmate]Support Role
- Lee Eun HyeGong Joo Hae [Dan Oh's classmate]Support Role
- Pyo Hyun JinNamgoong Dan Bal [Dan Oh's classmate]Support Role
- Han Myung HwanKang Chul Nam [Dan Oh's classmate]Support Role
- Kim Tae JungChae Yook In [Dan Oh's classmate]Support Role
- Jung Mi MiPark Yi Jin [Dan Oh's classmate]Support Role
- Song Ji WooPark Ae Ri [Dan O's classmate]Support Role
- Uhm Hyo SubEun Moo Young [Dan Oh's father]Support Role
- Choi Jin HoBaek Dae Sung [Kyung's father]Support Role
- Yoon Jong HoonLee Joo Hwa [Do Hwa's brother]Support Role
- Bae Hyeon SeongBaek Joon Hyun [Kyung's step brother]Support Role
- Ji Soo WonCha Ji Hyun [Nam Joo's mother]Support Role
- Lee Song YiSong YiSupport Role
Guest Role
- Kim Jae Hwa[Art class teacher] (Ep. 3, 12, 24, 26)Guest Role
- Yoo Dam YeonRa Hye Young [Joon Hyeon's mother] (Ep. 8, 12, 16, 18)Guest Role
- Song Chang Gyu[Street vendor] (Ep. 9)Guest Role
- Lee Yoon Sang[School director] (Ep. 9)Guest Role
- Yoo Ha BokOh Jae Bul [Nam Joo's father] (Ep. 9-10)Guest Role
- Kim Geon UBaek Kyung [Young] (Ep. 12, 21, 30)Guest Role
- Kim Jeong Hak[Dan Oh lecturer] (Ep. 16)Guest Role
- Kim Ji YooEun Dan Oh [Young] (Ep. 21, 30)Guest Role
- Lee Ye HyunKim Soo Hyang [Dried Squid Fairy's past lover] (Ep. 22, 24, 27, 29, 30)Guest Role
- Kim Yi RinOh Hee Joo [Nam Joo's older brother] (Ep. 23)Guest Role
- Lee Woo JePark Yang Yi [Dan Oh's classmate]Guest Role
- Hwang Bo Kwon[Waiter]Guest Role
- Jun Jung Il[Doctor]Guest Role
- Noreen Joyce Guerra[Student]Guest Role
- Han Seung Hyun[Secretary]Guest Role
- Lee Tae Ho[English teacher]Guest Role
- Kim I San[Chemical teacher]Guest Role
- Chae Hee Su[Buwon orchestra student]Guest Role
- Hwang Hyun Jeong Guest Role
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