Ohhh yesss! Levi would be incredibly stressed on the wedding day while Eren is chill as fuck. Levi wants everything to be perfect so he's running around like crazy making sure everything is in place. He definitely has a breakdown in the middle of the reception when the DJ won't play songs people are requesting (did this happen to me? Maybe). So he gets wine drunk to cope with the imperfections. Meanwhile Eren is having the time of his life dancing and drinking with his friends. But then he notices Levi's having a meltdown and pulls his ass out in the dance floor and makes him dance and laugh and before he knows it his bad mood is gone and he's forgotten all about the issues.
During the cake cutting, eren takes a big slice and shoves it in Levi's face. At first Levi is shocked, disgusted maybe. But then he sees the smile on Erens face and he takes the cake smeared all over his face and shoves it across Erens smiling mouth. Then Eren leans in and licks the frosting off Levi's cheek and nose.
Hange makes a toast and embarrasses the fuck out if Levi. He chugs his whole glass of champagne and they have to bring him another glass for Armins toast (which is much more tame. Eren's a lucky bastard).
Eren and Levi are so tipsy the moment they get into their ride back to the hotel they're all over each other, ties and suit jackets coming off. The driver speeds up to get to the hotel so he doesn't have to see anything shdjdj. Eren and Levi had planned on fucking all night, but after their first time, they're both so exhausted and drunk that they pass out naked in each others arms and don't wake up until late the next morning
They go somewhere tropical on their honeymoon but it ends up raining the whole time they're there. Which is fine because they just wanna be together. They end up drinking and getting high in their suite and just fuck all day, only leaving to eat and buy more alcohol.