Chaewon and you have both been rivals since you were kids, you two were neighbors and have always been on the same page even from birth.

You are a quiet girl, you don't like to do anything but study, but your hobby is music. Chaewon is a famous girl in school, she is active, beautiful and is pursued by everyone.

On a not-so-nice day, it was pouring rain. When you left, you suddenly saw Chaewon sitting on the schoolyard, without an umbrella, crying because her boyfriend cheated on her. Even though you didn't like her, when you see her like that, you can't help but go closer and cover her with an umbrella