I like that idea a lot! I can see problems happening like rumors being spread around, and if he gets bullied, then her getting dragged into it too could cause a lot of conflict... Like from my personal experience, I dated an unpopular boy once and some guys drove along the sidewalk and sprayed us with water guns, it was super uncomfortable for both of us. :0 

For the setting, do you want to do an American-style school or a Japanese one? Also, do you want to do character sheets today? I have a bit of homework to finish first, but I can get right on that after ^^