Boss at Work- Team Leader Couple

In Korean movie 18+ Boss at Work- Team Leader Couple, 2 managers Im Yoo-na and Kang Ji-won appear to be a couple in the company. However, Yoo-na is actually getting married to team leader Byeong-seok, who has feelings for her. Despite being married, Yoo-na still cannot forget Ji-won. Byeong-seok thinks he is in a stable marital relationship with Yoo-na, but he cannot understand her feelings. He deliberately invites Ji-won to his house. Byeong-seok’s obsession gets worse, and all three of them hide their true feelings, making the relationship strange.