Creator & Role Information

Kim, Gi-Hoon

Sung-chan is an old classmate and friend of the twins who claims that he has been looking for them for several years before he transferred in to the same high school as them. There he ends up in the same class as Se-wa and decides that he wants to become close friends with her. "Sung-chan's" real name is Gi-hoon and he harbors a secret grudge against Se-wa because he believes that she stole his little brother's heart for her transplant. Although his friendliness was initially just a pretense, Gi-hoon unexpectedly begins to develop deep feelings for Se-wa. Their relationship progresses until Gi-hoon discovers the twins had slept together. After confronting Se-Joon saying he "took advantage of Se-wa's inexperienced heart regarding love and relationships in general" and threatening to expose them to their parents, he is then beaten into a coma by Se-Joon.