Haemi Go

Essentially female lead of His Place, Saemi is a young student attending same college as Kang. She was his first time which made him fall for her much to her distress as Saemi already had someone else she liked. This person being Jason Lim whom she was in a on and off relationship with. Jason being married he was simply using Haemi as an outlet for the stress of his demanding married life. Eventually Haemi accepts the kind of person Jason really is and breaks off their relation, and become one of closest friend (with benefits) of Kang.