MonoDeku headcannons
Izuku became really tall, like 6 foot and theyll tease eachother about their height like they'll be cuddling and Monoma will say, "Your to tall for this." "Atleast I'm not short. That'd be a shame." "Fuck you."
Monoma feels threatened by someone talking to Izuku, like he'll feel like someone is trying to steal Izuku from him so he'll get really touchy and try to have Izuku leave mid conversation.
Inko constantly asks if Izuku has proposed yet so one day he jokingly says yes and she starts planning the wedding.
Whenever Monoma has a interview, Izuku goes with him and whenever a question makes him uncomfortable Izuku just carries him out of the studio.
One day in joint training, Monoma says Izuku his nice abs and Kendou yells at him because thats rude to say something like that and Izuku says it's fine and everyone was confused like 'wtf-' so that's how they told everyone they were dating.