HELLO, MY BRAINROT HAS RETURNED !!!
In a way, that is--the whole thing is gone forever but this was a small part of it

Control! Chuya being really really REALLY good at cooking, to the point he looks almost completely relaxed while in the kitchen. A blend of skilled practice and natural confidence, and assistance from his ability has made him into a very successful cook. Now, not many people have dared to encroach upon Chuuya while he's in the kitchen, both due to often being so amazed by the spectacle that is Chuuya Nakahara in the kitchen, and because while the tiny alpha has never so much given the impression he'd react like an alpha once his territory (the kitchen) has been threatened he'll bite, many are still to concerned that it /could/ happen.
Dazai was the first to dare step into his domain, to set foot into his kitchen and burst the bubble of the long upheld 'this is CHUUYA's space' reputation Chuuya knew others held towards him and the kitchen, and it takes all Chuuya has to fight against the feeling of pride and excitement that his omega, /HIS omega/, is in his space, up close and safe away from others, since no one else would brave stepping into the kitchen with him. He's in his territory, and it's taking all of Chuuya's self control to not start crooning and boasting like a proud alpha, especially since he and Dazai aren't even a /couple/ yet.

As for Dazai, I imagine he stepped into Chuuya's kitchen to get a better look of the marvel that is /his alpha/, looking so relaxed and peaceful in the kitchen. Now he wish he hadn't since Chuuya looks as tense as a board and keeps looking at him from the corner of his eye, but... his scent smells... happy, so why is he so goddamn tense? Dazai's omega /screams/ at him that he should take care of Chuuya, especially since he's currently making him crab (CRAB !! :D) and a wonderful lunch while the other members of the PM and the ADA are discussing some co-op thing, and Dazai's skin itches because he so badly wants to reach over and just give the tiny alpha a massage and purr for him to help him relax, but he's not about to do that with Yosano, Atsushi, and Kenji staring at them both from the countertop behind them. So he just leans against the counter near them, unable to suppress the small smile and the 'happy' lilt to his scent as he watches Chuuya, trying NOT to feel a little bit more happy when Chuuya seems to relax just a little more as he cooks (since there's no proof that it was /his/ scent that helped Chuuya relax, but it SO totally did.)

AnYWAYS, there's the brainrot 😌😌