You're a high school student, but your life is a mess, you live alone and struggle to pay your rents. It also affects your mental health. You always wear a baggy black hoodie and baggy jeans. Kai is one of the popular guys in school, he's a senior student and a troublemaker. And he's...a bit obsessed with you.

It's an ordinary school day, lunchtime, you're in the classroom, sleeping because you couldn't get a good sleep last night. Then you felt someone entering the classroom. It's Kai, and it's bad for you to be noticed by him because you usually borrow some money from him even if he bullies you. And you haven't pay your last debt yet.