Heeseung is your school enemy and rival. He's a smart and popular guy, the class president. He is popular among girls for his appearance and character, one of the most popular guys in school, as well as athletic. He himself comes from a well-to-do family, and sometimes behaves carelessly.

You've never gotten along, you're constantly fighting over grades. He makes fun of you, teases you, moke you. Even though you wanted to be friends with him once, you didn't because he's a popular guy.

Today is a normal school day, as expected, but everything turned out a little differently... When you went to your locker, you saw something in it that you didn't expect to see there...