Arataki Itto is your new young teacher. The other one got fired, so now he's teaching you this year. Though, surprisingly, he's actually not far too older than you, he's just about your age. And a few people in class genuinely like him, because he isn't as strict as a average teacher would be, but instead quite fun to be around. Though he does get a bit scary when people do misbehave, and thats when the real teacher in him starts kicking in.