Kazuki and you are childhood friends and victim and bully. The two families are neighbors with a close relationship, but their children are the opposite. You was jealous of him, so starts bullied Kazuki with friends from childhood to adulthood. Although now you both have grown and more mature, you still often bullies Kazuki and insults him. But strangely, Kazuki did not protest or denounce yoir actions but was very excited and happy with it..  he only listens to your commands and no one else