여름방학

Cho Yi-hyun

Kim Ha-yeon

Jung Jin-young

Jo Yoo-gyeom

류해준

Kim Jeong-yeon

홍예지

Seong Sae-ryeong

Seo Ji-young

Yoo-gyeom's mother

Kang Ji-eun

Sin Hye-jin

김보영

Shin Hyeon-jong

Cha Se-jin

Im Jeong-ok

강희구

Shin Seung-chan

Hwang Dae-ki

Nam-joon

Lee Hyun

Noraebang [karaoke] owner