임수정

Yoon-jung / So-eun

조정석

Ji-hwan

이진욱

Detective Gun-woo

정진영

Detective Kang

이기우

Detective Lee

온주완

Teacher Park

이태리

Kang Seung-bum

전신환

Biology Teacher

김보라

Choi Hyeon-ju

Shin Ji-soo

Nice Schoolgirl

정웅인

Kang Hyeong-chul

Kim Won-jin

Detective Yeo-ju

임예진

Vice Principal

박준규

Real Estate Man

Kang Bo-min

Hostage Woman

곽재용