A plastic surgeon at BomBom Surgery.
Good-looking, mild-tempered and logical guy. Prince charming. He looks like a gentle guy, but he is so strong inside.
When in relationship, he never plays hard to get. Instead, he values every moment be faithful to his girlfriend. Therefore, HaJin has been daiting YeoReum for two years without ups and downs.
One day, HaJin encounters AaRim who has been staying in his painful past. Finally, HaJin meets her, but he cannot be honest with her. Instead, he finds other ways to help her. When YeoReum notices and asks about AaRim, HaJin cannot open his heart to his girlfriend about his past related to AaRim.
"You have feelings for her, don't you? I can see that you wants to see someone else..." This is not true, but I feel uncomfortable more and more as time goes by. Do I really...?