Choi Chanhee is an 17-year-old high school student at Esang High School in Seoul, South Korea. He's a vocalist in the school band. His attitude has turned cold-hearted and not talked much since he broke up with you a month ago due to a misunderstanding. He's always trying to talk you into explaining the misunderstanding but you're always avoiding him and it's frustrating that he's not in the mood every time he trains with his band members. However he remained professional as the band's vocalist.