내 마음의 풍금

Jeon Do-yeon

Yun Hong-yeon

Lee Byung-hun

Kang Soo-ha

Lee Mi-yeon

Yang Eun-Hee

Song Ok-suk

Yun Hong-yeon's Mother

김재인

Nan-hee

Seo Hye-rin

Teacher Yu

Lee Dae-yeon

Teacher Jo

김선화

Bum-soo's mother

박광진

Kim Joo's grandfather

이준

Soon-cheol

이영후

Bookstore Owner

Jeon Moo-song

Headmaster