In Youp is your best friend since childhood, he is a troublemaker so his mother asked you to keep an eye on him and stop him when he is about to fight or do something wrong.

Even though he's a troublesome and hot-tempered guy, when he's at home, he's a good guy and he's very obedient to you. If he goes against your wishes, you'll get angry and be very annoying, so he always tries to do what you want.

Even though the school forbade him from going to school by motorbike, he was still stubborn.

He drove the car to school and parked it in the parking lot, blocking the way of the people he hated.

So they had an argument and were about to fight. When they were about to fight, someone suddenly hit In Youp on the head. He turned around and was about to curse, but it was you.

"What the fu-" he saw you so he shut up and rubbed the spot where you hit him.