ok so i kind of want a canon divergent fic where Stiles & Derek know each other from their childhood (Derek is like 3-4 years older than him and used to pick up Cora from the same daycare maybe?)
the plot doesn't change till s3's finale, minus some of the character's deaths. Boyd, Erica, Allison — they all live. except, see, except stiles knows derek.
and derek knows stiles.
so post nogitsune arc where everyone can finally breathe, there is no other danger that is incoming, stiles pesters derek to call a "pack night" and derek begrudgingly texts so in the group named "awooo plus others." everyone's first thought is that derek has been possessed, or something, but then stiles records a video of derek saying it too and sends it via derek's phone. nobody questions who took the video, and they all come together for the pack night.
on the day of, everyone trickles in slowly, except stiles who was literally the first to arrive. he had derek go with him to buy snacks and groceries, and then they both come back to the loft to make food for everyone else. they have a mini food fight, and stiles' white shirt is littered with all sorts of condiments and food, so derek lends him one of his henley's.
"Dude, doesn't this hurt your werewolf sensibility?" Stiles asks, the henley in his hands. Derek rolls his eyes.
"Shut up, Stiles."
(he'll not admit it for a long while, but derek loves stiles' scent clinging to his own).
and then once everyone is there, derek and stiles realize simultaneously that there's not enough room for everyone to sit around, even if some people sit down on the floor. there's only one big couch, one armchair, and the rest is carpet around the sitting area, which isn't too big. which means that lydia, allison, scott, and jackson have taken the couch; peter has taken the armchair; isaac, boyd, erica, kira, and cora have taken the space on the floor in a way that there is literally only one person's space left, and that too is a squeeze. it's clear that scott was gonna ask stiles to squeeze on the couch with them, and that the floor space, beside cora, is meant for derek.
what happens is derek picks up the tv remote and stiles hands everyone their snacks and puts the rest on the coffee table, and then derek sits down on the floor, and stiles, without a single thought and without a single glance at scott, who is trying to motion for stiles to come sit on the couch, sits in the v of derek's legs. derek, of course, puts his arm around stiles' waist and pulls him closer, so that stiles is sitting on his lap, and they have one (1) bowl of popcorn between them that is half salt, half tomato. derek gives the remote to stiles and takes the bowl.
stiles is muttering about choosing a film. he insists, "since i called this pack meeting, i'll choose the film," to which erica says:
"batman, you called the meeting?"
derek scoffs when stiles puts on star wars. neither of them is paying any attention to the others, and cora and peter are enjoying the not-so-silent freak out from the others.
derek says, "not again, stiles."
"inflection, derbear, inflection! it is the soul—"
"—soul of language. yes, i know, stiles. but i fight—"
"—against the periods and commas because it's entertaining to see you squirm. i mean me. it's funny to you to see me squirm, you asshole!"
derek just smirks, and snatches the remote to fast-forward the beginning credits, to which stiles sings holy murder and snatches it back and rewinds to the beginning.
"great, now we have to watch it again. why do you never learn, derek?" cora gripes, and peter is just watching in amazement as lydia's eyes go big with the new information. she's getting it.
the movie starts, but nobody but derek and stiles are actually watching it. cora is sort of into it, but she's not into rewatching, so she's on her phone. peter is into watching and betting who will break first. the others are entirely focused on how derek and stiles are interacting, like stiles isn't fucking afraid of derek (at this point derek is still the angry, will break your hand in training if you piss me off alpha; at least to them), and that derek isn't fucking annoyed by stiles.
stiles and derek are just. chilling. throughout the movie, stiles settles into derek, and derek wraps his arms around stiles, and they're cuddling.
derek feeds stiles once every five minutes, because stiles just turns his head and says softly, "der." after the first 2 times, stiles doesn't even have to turn. once their popcorn is over, stiles reaches over and takes the hot dogs — nobody says anything about him taking four of it (one by one, not all at once) because duh — and eats one bite, then leans back to feed it to derek, and then just stays there while alternating the bites.
stiles is super engrossed in watching so he's 1000% oblivious to his surroundings, but derek isn't, and he's just fucking proud of providing for stiles and having him in his arms, showing stiles off as his.
he just doesn't give a shit to answer the other's questions.
so just. yeah. this. where derek and stiles are childhood friends, true mates, and nobody knows how close they are until they do, and they're like "wtf???" while derek is just super duper possessive and proud and stiles is oblivious until comments from the pack members makes him rethink things and he like stops doing the things he normal does with derek (scenting, cuddling, touching derek every chance he gets, spending all of his free time with derek... yeah). day 1 has stiles antsy. day 2 has derek angry at his pack because of course they're behind his stiles-starvation. day 3 has stiles having an epiphany and derek whining outside stiles' window until stiles lets him in and says, "how long have i been stupid?"
"this is the 3rd day."
"not — no. i mean like... how long have we been dating without dating?"
derek's eyes widen. heartbeat is going crazy. "you don't mind?"
"you have literally been treating out interactions as if we are mated, dude. i don't think that question has any merit now."
"don't call me dude."
"can i call you mine, then?"
and he goes to kiss derek when derek just smiles, this bashful little small smile, but derek backs off.
stiles sighs. "we are engaged to be mated, huh?"
"engaged to be engaged to be mated, actually."
"you mean to say you've basically pre-ordered me?!"
derek is horrified. "no! what the hell, stiles?"
"NOW you use inflection? wow."
they go back to cuddling like crazy, except now derek kisses stiles on the head, forehead, and knuckles, and stiles combusts every time because that is so sweet.
the pack never do get over this development. they get over stiles having magic in a week, tops, but derek and stiles? as alpha and future alpha mate? yeah no. impossible. still unbelievable. every pack night they watch these two instead of the movies, because it is one of the few times derek actually lets his guard down and acts non-asshole-ish to them.
