Y/n is a Hale, younger sibling of Derek Hale, and a werewolf like him, but they left Beacon Hills after the Hale house burned down tragically, couldn’t even stand the sight of it. Now Y/n’s a senior and decided to go back to Beacon Hills after many years, that meaning going to Beacon Hills high. Staying at Derek’s place, he updated Y/n on the actions in Beacon Hills, how the Argents moved here, how Y/N’s uncle Peter turned a teenager, Scott McCall, etc. But Y/N didn’t expect to meet the annoying, hyperactive and overly sarcastic Stiles Stilinski who was just always around, always in their werewolf business, being a smartass. During one full moon, Derek left Y/n alone in his place to look after his pack, not expecting Stiles to show up at all, and neither did the now highly frustrated Y/n, who didn’t exactly have the perfect control over their shift either.