I'll Beat You Up, You Little Rabbit Osamu Dazai

A story with everyone doting on the protagonist. OOC. If you can't stand that, turn left and leave. Don't show off your sub-25 IQ. One day, Mr. Dazai was being "hard at work" when a stone fell from the sky and hit him right on the forehead. And so... A mischievous little Chuuya was born, cute enough to make you lose your mind. He showed up on top of a Port Mafia executive's head, on the tail of the tiger-man worth seven billion, and in the arms of the Port Mafia's vicious attack dog... Theme: As a proper Dazai fan, you have to mess with Dazai a little