아이들은 즐겁다

Lee Kyung-hoon

Da-yi

Park Ye-chan

Min-ho

홍정민

Yoo-jin

박시완

Jae-kyeong

Ok Ye-rin

Shi-ah

Lee Sang-hee

Da-yi's mother

Yoon Kyeong-ho

Da-yi's father

Gong Min-jeung

Teacher