Lee Dong-wook
— Park Young-ho
임수정
— Joo Hyun-jin
Esom
— Hong Joo-ok
Jang Hyun-sung
— Jin-pyo
Kim Ji-young
— Kyung-ah
Lee Mi-do
— Yoon-jeong
Lee Sang-yi
— Byung-soo
지수연
— Ye-ri
Jo Young-jin
— Hyun-jin's Father
박슬기
— Mask Singer
윤계상
— Sun-woo
Jo Dal-hwan
— Oh Si-in
Lee So-yeong
— Young-ho's Ex 2
Kim Sang-wook
한종훈
— Teacher Kim
Oh Jun-hyeok
구시연
Han Yoon-ji
— Lee Hyun-jung