Yoo Hai-jin

Gui-bo

Kim Min-jae

Sung-woong

Lee Sung-kyung

Ga-young

Sung Dong-il

Sung-soo

Jin Kyung

Mi-ra

Na Moon-hee

Gui-bo's Mother

황우슬혜

Do-na

Park Gyu-young

So-young

Lee Han-seo

Ji-young

Kim Tae-hun

Seung-hyuk

Hyun Bong-sik

Coach

김강현

Koh Soo-hee

최유화

Hye-jung

Lee Ji-ha

명석근

이예원

Ga-young (young)

김태윤

Gym member

송인섭

Gui-bo's Gym Male Member