Yongseok, CHECKMATE Wiki

Yongseok (용석) is a South Korean singer under GRACE COMPANY Entertainment. He is a former member of the co-ed group CHECKMATE.

CHECKMATE Members Profile (Updated!) - Kpop Profiles

Yongseok, Kpop Wiki

CHECKMATE Members Profile (Updated!) - Kpop Profiles

H(A)UNT., K-Pop Fanon Fandom Wiki

CHECKMATE (group), Kpop Wiki

Z.Hera ♀ - Asianfanfics

You (CHECKMATE), Kpop Wiki