Chae Seo-jin

Choi Soo-hyun

Kim Jung-hyun

Choi Do-hyun

Seo Young-hwa

Yeon-hee

Jeong Jun-hwa

Chemist

Jo Jae-yeong

Mapo Bridge Man

Lee Woo-joo

Library Kid

Jeong Jong-yeol

Library Janitor

Lee Chae-kyung

Psychiatrist

Lim Hyung-kook

Do-hyun's Father

Yang Mal-bok

Se-young's Mother