Tendou was used to being known as a monster from a young age. He’s learned to take insults, and use them.

After graduating High School was no better. He wasn’t accepted into any colleges. So he turned to drinking and smoking.

Shortly after his 25th birthday, he gets accepted into a group of hoodlums. Important ones known as the Yakuza.

He’s given orders to patrol the school you’re at, and pose as a teacher since there are many students who owe the Yakuza money.