Someone Else's Man

Jeong Eun-Se's life goal is to marry Kim Jin-hong, the perfect boyfriend to anyone, and build a family that no one would envy. She is growing tired of her boyfriend who cannot fill her loneliness, but she begins to feel affection for Lee Jae-won, a seemingly indifferent but delicate shooter, even though she knows he is married. In order to have him, she begins to consciously or unconsciously break down her moral beliefs one by one...

(Source: KakaoPage, translated)