How about a Love Island AU?
Maybe as part of a marketing strategy, the producers decide to bring regular (non influencers) people to the show. Maybe Buck joins post-Abby breakup or something and meets Tommy there ( I know Tommy's little old for Love Island but I'm choosing to ignore that).
They slowly get closer and fall in love and unbeknownst to them become the most talked about ship online.
PS : I loved your writing in the Red string of Fate AU!
Hello, friend! Thanks for the prompt, and I'm glad you liked the first one :) I'll be honest here, I had to look up Love Island because I never watched it, I hope I got the gist.
1 - As you suggested, this is early s2 Buck. It's at the point he has actively accepted that Abby isn't coming back, but he also doesn't feel like crashing on anyone's couch after moving out of her place. He wants to find love, and genuine connection, and the couple of dates he goes on from dating apps don't work out. The people he meets through work are interested in the firefighter, not anything else. And then, he finds out about the casting call for a bunch of super normal, every-day people for Love Island and decides, "Why the hell not?" He applies, and the producers like him because of his easy-going nature, his looks, his job, and also his past. He seems like an interesting candidate, so he gets casted.
2 - The place is gorgeous. Buck's been traveling for so long, and he missed it deeply and remembers why he loves it. And he also likes the people he meets. There's a bunch of them, some beautiful women and hot guys that Buck just has to ask about their gym routine. They're a mixed group of sexualities which Buck has no problem with, he's an ally after all, so there's a couple of same-sex-couples as well as straight ones. As they get to know each other, Buck meets another man from LA who is even a firefighter, too, Tommy Kinard who has huge arms and a kind smile. They hit it off, and Buck thinks that he at least already found a new friend here. And hey, Tommy was even at the 118 and knows Hen and Chim, so maybe there's a chance their new friendship can last beyond the show! He ends up coupling up with a girl he meets who seems very interested in his career, and he hopes this will work out better for him. He's not that interested in their every move being filmed, but hey, they'll be fine.
3- Things soon take a different direction for him, though. Sara, his partner, is cool and lovely and all that, but Buck finds himself in Tommy's presence more often than not. It's like he's seeking him out specifically, like a magnet is pulling him his way. Buck doesn't like the guy Tommy is with once he finds out Tommy is gay, and he feels awful about it. Why was he fine with Charlie when he thought he and Tommy were a friendly couple, but now that he know they're trying for love, Buck cannot stand to see them together? He doesn't understand himself, but he quickly realizes that all he wants is to spend time with Tommy. He likes him, likes his voice, likes the way he says Evan. So why is he being so weird about it?
4 - The producers are eating it up. They already know that this is going to be gold for them, and they decide to drive it up in editing, showing Buck's jealous glances whenever he sees Charlie and Tommy together, and even Tommy's longing glances in Buck's direction that Buck never notices. Buck and Sara try to make it work, but they soon realize that there's no real romantic chemistry between them. Sara thinks she already knows where it's going, but at this point, she's just watching it because it's funny. Buck seeks Tommy out whenever he can, and Tommy is always happy to see him, even if Charlie isn't. Tommy and Buck might not have many shared interests, Buck finds, but they fit together anyway. They can talk about their interests and the other will listen no matter how long it takes. They show vulnerability to each other - Tommy tells Buck of his family, and the army, and Buck tells Tommy of his parents and his sister, and then Tommy speaks about Abby, and then Buck talks about Abby and they have a fight. It's the dramatic thing that everyone was waiting for, the viewers are foaming at the mouth, and Buck's and Tommy's couples are at no risk of being voted out because everyone wants to see the two of them reconcile.
5 - Buck and Tommy are kind of forced to reconcile by the show, but they don't really notice that. They do talk things out, and Buck finally has his "aha-moment" as Tommy tells him about his experience hiding his sexuality and coming out. Things he describes remind Buck of himself even though he isn't actively hiding anything. Once they reconcile, they get back to their partners, and Buck wants nothing more than to hold Tommy's hand the way Charlie is. He and Tommy share some more quiet moments and talks and longing glances, until they are faced with the final decision to either stay with their partners or recouple. And Sara knows what Buck wants to do and asks him not to because she wants to win, but it goes in one ear, out the other. Buck wants to finish this thing with Tommy, and he wants to return to LA with Tommy, so that's what he tries. For a bit, he worries that Tommy won't want him and he read it wrong and Tommy just likes him as a friend, but those worries disappear when Tommy kisses him for the world to see.
Bonus 6 - Like Buck wanted, they return to LA together as boyfriends. They win the whole thing, obviously, being the fan-favorites with their dramatic change at the very end and their so-perfect-it-could-be-scripted fight. Buck gets a new apartment for himself, but he and Tommy spend most of their time together. One night, they get drunk and watch back their season, finally getting to see both sides of it. And then, they find out about viewer reaction and that #Tevan honest to God trended on the night they finally got together. Tommy has to stop Buck from going down a social media rabbit hole by thoroughly distracting him. Buck doesn't complain.
Send me an AU prompt and I'll give you five facts :)