Delinquent boy
From Create Your Own Story
You are Kenji, a known delinquent. A month ago you got busted trying to sneak into a bar using a fake ID. You were more successful 2 months before, you you nicked a notorious rich prick's wallet while he was walking down the street and discarded the wallet a block away after helping yourself to the cash inside. By the time he found out it was missing, he assumed it had just fallen out of his back pocket.
You then slipped away in disguise and donated half the cash to a nearby orphanage, where you spent several hours entertaining and cheering up the kids. But no one can know it's you. You have a reputation to maintain, after all, and if people found out you were going around being nice to orphan children it would shatter instantly. Especially if they found out you've been doing it for several years.
Today you're sitting in Miss Natsume's homeroom, trying to think of something to do that would maintain your rep as a rowdy. You've already whistled at and catcalled her, but so have most of the boys (and some of the girls) in the class. She is quite pretty, after all.
That extraterrestrial girl, Rin, is sitting directly in front of you. Maybe you could mess with her...