Kim Jung-eun

Character: In-young

Lee Tae-sung

Character: Lee Suk / Lee Soo

Kim Young-jae

Character: Jung-woo

Jung Yu-mi

Character: Young In-young

Lee Joo-sil

Character: In-young's Mother

Kim Kkob-bi

Character: Cram School Student

Jang So-yeon

Character: ER Nurse

Choi Ban-ya

Character: English Teacher

Jun Kim

Character: Adult Lee Suk

Lee Seok

Character: Young Jung-woo

Kwak Min-seok

Character: Driver