Kim Ji-min
Kang Ha Ra
Tang Joon-sang
Lee Seo Jin
Yoon Chan-young
Lee Woo Jin
유준
Choi Dong Yeong
시은
Jin Sun Mi
Heo Jung-min
Choi Gi Chan
김명수
Kang Suk
엄현경
Song Soo Ji
Choi Shang
Teacher Ma
Saison 1
16 épisodes
A children's mystery drama about four kid detectives solving various cases happening at school.
