Director
- Kim Jin Min Director
Main Role
- Lee Hyun WooKang Han KyeolMain Role
- JoyYoon So RimMain Role
- Lee Jung JinChoi Jin HyukMain Role
- Lee Seo WonSeo Chan Yeong [Bass of Crude Play]Main Role
- Hong Seo YoungChae Yoo NaMain Role
Support Role
- Kim Sung JooYoo Shi Hyun [Leader/Vocalist of Crude Play]Support Role
- Jang Ki YongJi In Ho [Drums of Crude Play]Support Role
- Shin Je MinLee Yoon [Guitar of Crude Play]Support Role
- Lee Ha EunYeon Soo Yeon [Mush&Co Manager]Support Role
- Park Ji YoungYoo Hyun Jung [CEO of Who Entertainment]Support Role
- Song KangBaek Jin WooSupport Role
- Park Jong HyukLee Gyoo SeonSupport Role
- Choi Min SooKang In WooSupport Role
- Jun Yoo RimLee Se JeongSupport Role
- Kim In Kwon[Homeroom Teacher]Support Role
- Im Ye JinKim Soon HeeSupport Role
- Jung Yoo Ahn Support Role
- Kim Min SeokKoo Joon SeokSupport Role
Guest Role
- Jung Yoo GeunKang Han Kyeol [Child]Guest Role
- Lee Jun YongHimself [Member of INX](Ep.6)Guest Role
- Lee Sang HoHimself [Member of INX](Ep.6)Guest Role
- Gu Bon KookHimself [Member of INX](Ep.6)Guest Role
- WinHimself [Member of INX](Ep.6)Guest Role