Destiel meet au where the boys are in high school and they’re both super popular but they’re kind of rivals.
Maybe because Cas was new at the school in their last year and he’s so clumsy and he kinda shoved Dean-the-captain-of-the-WhateverSportYouLike-team without meaning to and Dean turns like ‘what’s your problem weird new guy?’ And so Cas fucking owns that shove and glares the shit outta Dean and Dean kinda loves it because *hot damn* but these guy doesn’t know him and he’s glaring like there’s no tomorrow so now they hate each other.
So they glare their way through every lunch, and through prom and through applying to the same university and through their graduation ‘cause their stubborn shits. They get into that same university and run into each other regularly and goddamn it Dean is so fucking beautiful Cas kinda times their coffee-shop run-ins without knowing Dean times their bookstore run-ins and they’re so stupid. And they both love ThisGreatBookYouAlsoLove and the author comes to that bookstore to sign copies of it and they both go.
Cas is at the end of the line with his friends when Dean comes in immersed on his phone and Cas’ heart does not skip a bit shut up because Dean is actually cutting line, like right in front of Cas wtf? And Cas cannot be ok with it and he goes “Hey, dude! Get in line!” All furious and cute and Dean is a little bit out of breath because he hadn’t realize Cas was here, that means they both like this book, that’s so awesome. But he’s so scary too and Dean goes “Woah, sorry man, I didn’t even see you there” but it comes out all wrong, it sounds like Dean suggested Cas and his friends are insignificant and Cas is now furious and his friends are dead silent because no one wants a furious Cas.
“Oh no, you did!” Cas says “You’re just expecting us to be okay with it because of your pretty face, but your gonna have to wait like all the rest of us” he’s all flirty rage and Dean’s eyes are huge with surprise but he doesn’t miss a beat and he’s like “Excuse you blue-eyes-that-shine-brighter-than-sapphires? Who are you blaming for being pretty? I’m just hoping to ask out TheAuthor, but if you go first I’ll have zero chance of doing that! Can you blame me for watching my back?” And his crooked smile is so attractive Cas can’t deny now his heart is not functioning normally, but his mouth is. “Oh c'mon! You want us to watch your back so we let you cut on account of the way your ass looks in those jeans, but it won’t work, so Get.In.Line” Cas is squinting so adorably now, glaring like he did when they met and Dean fully grins when he answers “You know what? Fine. I’ll get in line, hopefully I’ll get a look at your ass so it’s a bigger win then taking TheAuthor out to get coffee” he practically said Cas was better than TheAuthor, or at least that his ass is and that is like TheBestCompliment so Cas blushes like a virgin while Dean walks to stand behind his friends.
After they get their books signed Dean catches up with Cas and stops him before he makes it out of the bookstore after his friends. Dean has a pen in his hand and he unabashedly takes Cas’ hand and scribbles down his phone number while Cas stares at his lips without shame now. When he’s done Dean shrugs and says “Y'know I can wear these jeans whenever you like so, you just give me a call” he winks at Cas and Cas can’t help his chuckle. “Okay, then, I will” Cas says before he exits the store, leaving behind an excited and blushing Dean.