Director
Screenwriter
Main Role
- Bae SuzyGo Hye MiMain Role
- Kim Soo HyunSong Sam DongMain Role
- Ok Taec Yeon Main Role
- Ham Eun JungYoon Baek HeeMain Role
- Jang Woo YoungJasonMain Role
- IUKim Pil SookMain Role
Support Role
- Uhm Ki JoonKang Oh HyukSupport Role
- Lee Yoon JiShi Kyung JinSupport Role
- Park Jin YoungYang Jin ManSupport Role
- Jang Hee Soo[Baek Hee's mother]Support Role
- Han Ji HooPark Do JoonSupport Role
- Jung Min JooJung Ah JungSupport Role
- Lee Yoon MiMaeng Seung HeeSupport Role
- Baek Won GilGong Min ChulSupport Role
- Jeon Ah MinJo In SungSupport Role
- Lee Hye SookSong Nam BoonSupport Role
- Kang Yi SukJin Gook [Young]Support Role
- Han Bo ReumHa So HyunSupport Role
- Park Jin SangJun Tae SanSupport Role
- Park Hyuk KwonGo Byung JikSupport Role
- Lee Byung JoonShi Bum SooSupport Role
- Ahn Kil KangMa Doo ShikSupport Role
- Ahn Seo HyunGo Hye SungSupport Role
- Choi Il HwaHyun Moo JinSupport Role
- Ahn Sun YoungKang Oh SunSupport Role
- Yoon Ji YooLee Ri AhSupport Role
- Kim Yoon Tae[Ring Reporter]Support Role
- Park Won SangYun Seong Gil [Group K president]Support Role
Guest Role
- Gu Jun Yeop[Host of dance competition]Guest Role
- Jo A Young[Baek Hee’s Kirin students](Ep.16)Guest Role
- Meng Jia[Flash Mob Dancer]Guest Role
- Bae Noo Ri[Kirin High Student]Guest Role
- Lee TeukHimself (Ep. 13)Guest Role
- Bae Yong JoonJung Ha Myung (Ep. 1-4)Guest Role
- Min[Flash mob dancers] (Ep.16)Guest Role
- Eunhyuk[Himself] (Ep. 13)Guest Role
- Park Eun BinGo Hye Sung (Ep. 16)Guest Role
- Nichkhun[Lee Ri Ah's CF partner]Guest Role
- Hwang Chan Sung[Kang Oh Sun's imaginary boy]Guest Role
- Kim Hyun JoongHimself (Ep.1)Guest Role
- Park Hwi Soon[Jin Gook's roommate]Guest Role
- Joo Young Hoon[Composing teacher]Guest Role
- Jung Jin Woon[Flash Mob Dancer] (Ep. 16)Guest Role
- Fei[Flashmob dancer]Guest Role
- Im Seul Ong[Flash mob paramedic]Guest Role
- Ahn Jae Won[Kirin High Student]Guest Role
- Kobayashi Yutaka[Singer / part time worker] (Ep. 10)Guest Role
- Jun Hyun Moo[MC]Guest Role
- Shownu[Woo Young's backup dancer]Guest Role
- Park Jae Woong[Big guy]Guest Role
- Choi Jung Nam[Wife of the president]Guest Role
- Baek Da Eun[Kirin school student | Dalshabet member]Guest Role
- Kim Young Hee Guest Role
- Young K Guest Role
- Jo Ga Eun Guest Role
- Serri Guest Role
- Bang Joong Hyun Guest Role
- Sumi JoHerself (Ep. 1)Guest Role
Unknown
- Kim Kyung Ryong Unknown
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