Lando and Dan drunkenly get married in Vegas, maybe with the oblivious au. They're "just friends" and are out with some people like Michael, Max and Charles and come across some chapels on their way to another bar. Max talked them into it and they thought why not it'll be hilarious.
When they wake up the next morning, cuddled together nothing feels off at first because cuddling is normal. Lando has a headache from all the drinks and searches for something to drink when he noticed the ring on his finger. He tries not to freak out but bumps into a shelf and wakes Daniel. Dan sees Lando frantically pacing through the room and asks him what happened. Lando stops and looks at Dan, tears building up in his eyes. He held up his hand to show the ring. Daniel obviously has the same one.
Lando feels so sad because deep down he really wants this but is so sure Dan doesn't and he doesn't want to tie Dan to himself when he could have some other person (omega if we go abo).
Daniel cradles him in his arms and they have a long anxiety ridden talk where they finally lay all their feelings bare (is that how you say that?) and kiss for the first time.
That's how the others find them, intertwined into each other on the hotel room floor, sharing small kisses. They leave them alone because the two hadn't noticed them, to wrapped up in their little bubble.
I love this! I'm actually so hyped right now some guy gave me a weird look in the airport but anyway!
Them heading out in Vegas for a few days with some friends because Daniel says they need to unwind. Lando normally doesn't party but he's sharing a room with Daniel and feels he needs a bit of liquid courage to keep him going so let's Max and Charles talk him into drinking and that somehow turns into him and Daniel flirting and ending up married
Neither of them remember it in the morning or that they had confessed to each other before deciding to get married but they did. They confessed everything they couldn't while sober and made that leap
When he wakes up, Lando feels as if he's ruined everything. Ruined their friendship, Daniels life, their careers but Daniel is so sweet qnd reassuring. Telking him they can get it annulled if Lando wants and that breaks Landos heart even more and Daniel can see that
Lando just feels so heartbroken by the idea of annulment that Daniel has to wrap him in a hug and ask him what he wants and it's then that Land breaks and whispers 'you, it's always been you' and then Daniel is crying because he can't believe this beautiful man wants him qnd they spent so much time afraid of this when its perfect
They know their parents will kill them but they decide not annul it when they've talked everything over because even though it was a leap, it also feels like they're exactly where they should
Especially when Daniel shakily asks if he can kiss his husband and Lando says yes faster than he can ask the question qnd they're kissing and holding each other and laughing
Max and Charles pop their heads in at some point after finding the video of the wedding on their phones and find the two of them curled together, sharing soft kisses and whispers and decide showing them the videos can wait