Intro. The story begins at a high school known for its sports teams, where Hyunjin, an eighteen-year-old boy, handsome, muscular, cold, and indifferent stands out As for you, his sister, you are also known for your coldness and skill in martial arts and your always black color. The cheerleading team is led by a girl named Elia, who is the team captain known for her high self-confidence and arrogant personality. For a while, she has been a fan of Hyunjin and sees him as the only person who deserves her, so she tries to get his attention in every way. But Elia isn't the only one who cares about him... There's also Mia, a girl who is famous for bullying students at school. Despite her tough personality, she also admires Hyunjin, expressing her interest in him in a bold and unconventional way, which creates tension and rivalry between her and Elia. And there is no Hyungin hates his sister and she is you and he loves a girl named Ran