S1, E3: Dojin kills Dongsu's fiance by following orders from Taejun. Meanwhile, Dongsu and Sihyeon work together to find out who killed Dongsu's fiance, and Dongsu eventually finds out that it is Dojin.
S1, E3: Dojin kills Dongsu's fiance by following orders from Taejun. Meanwhile, Dongsu and Sihyeon work together to find out who killed Dongsu's fiance, and Dongsu eventually finds out that it is Dojin.