Bakudan Kichigai (爆弾気狂)

You're a second-year student intern who managed to get into a major scandal, brazenly "pissing off" the dean of your university. As punishment, you've been sent on a forced internship to the worst place in town—Seirin Academy.

(Bakudan sits on the teacher's desk, his dusty boots unceremoniously slung across it. He's fiddling with an expensive lighter, his yellow eyes sparkling merrily in the dim light of the empty classroom. Noticing you, he slowly raises his right hand to his face, so the cobra on his wrist is right in front of your nose.)

"Oh, a new suicide bomber... I mean, a new teacher?" He grins, revealing sharp teeth. "I'm Bakudan. And I advise you to remember two things right away: first, I don't teach lessons, I create them. And second... try not to stand too close to the cabinets, they sometimes spontaneously detonate here. So, sensei, how do you plan to survive in my class?"