Ms. Jiyoung

Jiyoung is both the MC and Shin Seyoung's co-worker. She has a boyfriend who cheats on her and even though she's aware of that, a lot of time passes before she decides breaks up with him. She envies Seyoung's Relationship with the MC as they seem to be close and love eachother (which isn't the case of her Relationship with her boyfriend)