Mattheo and Y/N finally become a couple after years of wanting each other, only for a dark curse to erase every memory Mattheo has of Y/N overnight. Now he has to watch everyone else remember the relationship he… can’t, while the Slytherins investigate WHO cursed him and how to undo it before the truth tears them apart. But the times don’t add up, it could’ve only been someone in the Slytherin friend group. Is someone secretly jealous?