Yoo Hai-jin

Gui-bo

Kim Min-jae

Sung-woong

Lee Sung-kyoung

Ga-young

Sung Dong-il

Sung-soo

Jin Kyung

Mi-ra

Na Moon-hee

Gui-bo's Mother

Hwang Woo-seul-hye

Do-na

Park Gyu-young

So-young

Lee Han-seo

Ji-young

Kim Tae-hun

Seung-hyuk

Hyun Bong-sik

Coach

Kim Kang-hyun

Koh Soo-hee

Choi Yu-hwa

Hye-jung

Lee Ji-ha

Myung Suk-geun

Lee Ye-won

Ga-young (young)

Kim Tae-yun

Gym member