Irresistible

Arthur Kirkland knows the responsibilities and power given to him for being a school prefect. He knows it's a hard job, and it'll be even harder to keep. Strictly saying, he's done everything in his power to keep his reputation up and clean.
No fights. No embarrassment. No love.
He was the one person in the school who's known for a kick to the crotch if a move's pulled on him.

Although, when a new, rich playboy who doesn't know any better, begins hitting on girls and breaking their hearts in an instant, Arthur makes it his duty to stop him from destroying his school. But when this playboy begins to hit on Arthur, it surprises everyone when the prefect questions whether or not he likes it. Yes, verbal and physical abuse is portrayed towards the boy by Arthur, it only edges him on to continue teasing him.

It might make others back off, but this playboy just found Arthur's tsundere like behaviour to be
Irresistible.