1/2

Sukeban girl comes to MC's school to pick some fights. Spotting MC, she goes to take a swing. MC however spots a 500 yen coin on the ground, and bends over to pick it up, tripping her. She gets up and tries to take another swing, but MC accidently elbows her as he turns around to show his friend the coin he found. He turns around and sees the girl on the ground and tries to help her up but ends up headbutting her mistake, after which he princess carries her to the infirmary, unaware that he caused her pain. She runs away, vowing revenge.

For the next few weeks, the sukeban girl would show up at the gates of MC's school, challenging him to a fight. Despite the MC's judo background, he refuses to fight her, and tries resorting to romcom styles of avoiding the fight, such as preparing to fight, only to bolt and runaway, leaving a scarecrow by the shoe locker while he sneaks out via a different exit, or trying to get her to obsess over someone else by seeing if he can find someone to date her.

He eventually realizes that because she's skipping classes every day to get to reach his school by end of class, he can transfer to her school and hide in the lion's den. This idea seems to work and he's able to make some new friends, but it soon becomes apparent that his new friends are in the same gang as the sukeban girl. Thankfully, she hasn't been around due to her obsession with the MC and hasn't told the gang the MC's name, so they aren't able to piece it together, but eventually, they insist that the MC and Sukeban girl should meet.