스무살

이유리

as Chae-ri

공유

as Joon

Shoo

as Soo-young

Jung Sung-yoon

as Tae-hyun

Moon Ji-yoon

as Sang-hyuk

임성언

as Min-hee

조달환

as Seok-goo

김용건

as Sang-hyuk's Father

이미영

as Sang-hyuk's Mother

김지우

as Song-yi

Yoo Seo-jin

as Professor