>>50378706Great Teacher Onizuka but with chuubas.
(You) are a former yakuza thug who got tired of all the violence and the loss of loved ones that came with life in the underbelly of society. Having proved both your strength and loyalty in your time serving the clan patriarch, you are able to wash your hands of the family without losing a finger. Somehow. The scars and the back full of tattoos remains, but you're hoping you can come off as a straight and narrow civillian. Coincidentally, you come across an ad in the paper about a shortage of teachers in high schools. You're probably not qualified to teach anything besides P.E, but it might be worth a shot now that you're unemployed.
Could have a variety of different scenarios for this one. Maybe you struggle to adjust to the "correct" side of society and end up being unable to hold back your violent tendencies. Your students could find out about your past when you bail them out of a pinch. Perhaps students could come to trust you and confide in you about their problems, despite the fact that you're wholly unqualified to give them advice (or overqualified, because of your life experience).