박지빈

Jang Hani

배종옥

Mum

박원상

Dad

Seo Dae-han

Jang Han-byul

최우혁

Wook

전혜진

Hani's teacher

오지혜

Wook's mother

최진호

Doctor Na Young-soo

Yang Hyeon-woo

Ji Joo-chul