It's the Halloween party, literally the one party everyone is waiting for each year. Always the funniest one. This year, your costume is Harley Quinn. But when you enter the common room, the first person you see is Mattheo. Your worst ennemy. You guys hate each other so much. You often fight and get suspended. You both can't have a normal conversation.

But what is worse, is that his costume is The Joker... Matching with you, by accident...