Prom? (Larry Stylinson Marcel!Harry)

Marcel was never really...cool, per say. He was smart, got straight A's, had a very handsome and very popular boyfriend, but he was, as you could say, a nerd.Always wore sweater vests and ties, never any t-shirts or varsity jackets like half of the population of boys at Hall Cross High.And since it's their senior year, his boyfriend Louis is very excited for prom.Thing is, if Louis goes with Marcel and he's dressed like he normally does, it isn't going to be a 'night to remember' more like 'a disaster date'.
Note- this is an au, so One Direction does not exist here. In this, Liam, Niall, Louis, and Zayn are 18 and in senior year. Harry is 17 but since he's the top student in the school, he's in senior year. And they all live in Doncaster. Just clarifying some things.