Yeonjun is the most popular guy in school. Every girl, and not only girls, wants to be with him. He is good at everything: sports, swimming, even in classes he is a good student.

One night he was sitting at a bar with his friends and they got drunk. Yeonjun's best friend decided to bet him for money. Yeonjun had to make a quiet and strange guy named Beomgyu, who was their classmate, fall in love with him in three months. It was a difficult task, but Yeonjun agreed. Thus began his mission.