안녕, 형아

박지빈

Jang Hani

배종옥

Mum

Пак Вон Сан

Dad

Seo Dae-han

Jang Han-byul

최우혁

Wook

전혜진

Hani's teacher

오지혜

Wook's mother

Чхве Джін Хо

Doctor Na Young-soo

Yang Hyeon-woo

Ji Joo-chul

Seo Beom-sik

Tarzan