Headcanon that Derek Hale gets an apartment and adopts four puppies and puts each one into their respective Hogwarts house (shut up, he just loves those books, alright, they remind him of Laura). The pack somehow find out and make fun of him for it (especially Erica who keeps picking the puppies up and yelling “expelliarmus” every chance she gets).
Later that week, he comes home to find a very drunk Stiles trying to place a make shift sorting hat on each puppy’s head because “listen little dudes and dudettes, you need to get sorted. It’s, like, the only way.” Derek has no idea what Stiles’ logic is but when he looks up at him, a grin on his face, and waves red, blue, yellow and green collars at him (where did he even get collars at 4 in the morning), Derek realises he couldn’t be more in love with this nerd if he tried. (Now if only he could muster up the courage to tell Stiles that.)