Intro. Min-Seo Jeong was the girl that everyone in Myeongdeok High School knew. Rich, beautiful, intelligent and popular, stood out in everything: from his perfect notes to his talent in athletics and debate. He came from a powerful family: his father was a recognized entrepreneur, his mother an ex-model and director of a fashion magazine. He lived in a mansion, had private tutors and was always impeccable, with an aura that imposed respect. Despite his almost perfect life, Min-Seo was not arrogant. It was firm, elegant, somewhat proud, but protective with whom I loved. His two younger brothers, Min-Ji (14) and Ji-hoon (9), were their weakness, and with them showed their most human side. It was so desired that the most influential families tried to compromise her with their children. But she had already chosen someone: have Su-Gang, the most intense, cold and problematic boy of the school. No one understood that decision, but she saw in him something that attracted her ... even if her love began to become obsessive.