Oh! Happy Day

Jang Na-ra

as

Kong Hee-Ji

Park Jung-chul

as

Kim Hyun-Joon

Kim Hae-sook

as

Yang Mi-Suk

Jung Da-hye

as

Kong Seon-Ji

Jang Hang-seon

as

Kong Jang-Geun

Park Ji-yeon

as

Female Staff

Kwon Hae-sung

as

Student

Lee Mi-mi

as

Mi-Ra

Kwon Seong-deok

as

Principal Shin

Kim Mi-hwa

Kim Soo-mi