High School Mystery Club

Ji-yoon Park

Self - School Member

Do-Yeon Jang

Self

Eun-jae Lee

School Member

Ye-na Choi

Self

Moon Sang-hoon

Self - Kim Jung Ho [Teacher]

Kim Do Hyeong

Self - Gu Yeon San [Mathematics Teacher]

Jason Scott Nelson

Self - George Bushman [English Teacher]

Kim Du Hyeon

Self - Kim San Mun [Teacher]

Park Jung Yoon

Self - Kim Yu Jeong [Teacher]

Jo So Yeong

Self - Ki Shin Hee [Student]

Nam Ho Yeon

Self - Ki Bong Kwon [Teacher]

Dong-Hyun Kim

Self - Kim Dong [SSA Special agent]

Bibi

School Member (2021)

Choi Sung Min

Self - Hwang Sung Min [Mi Na's brother]