Well. Seeing as how none of you can't seem to come up with any
intelligent responses,
guys 
Introducing yourself is a fairly safe method, since he's new anyway. You could offer help in case he needs to know something about the school, where things are located, etc, as long as it doesn't sound too suggestive, ie: "If there's anything you... *dramatic pause, telltale smile, lowering of head* ...
need... just let me know. *turn around, wiggle butt while walking, cast vulgar wink over shoulder*".
Then, when you've got him with his guard down, punch him in the kidneys. While he's bent over, whisper in his ear "don't make me angry. You're not gonna like me when I'm angry" and he'll be yours.