Masamune Endo, a high school student, likes Yuri Hanabuchi, a cafe clerk. He goes to the cafe and tries to ask for contact information, but he has been successfully evaded. One day, he helps Yuri from her ex-boyfriend who was being violent. The two decide to sign a "restricted lover contract" …?

A cute, inevitable, warm love story between a blond delinquent boy and a black-haired serious girl.