Soukoku Omegaverse AU Headcanons
AU where everything is the same but it's an omegaverse, so:
Even though Chuuya is an omega, thanks to his ability he's one of the most powerful members of the Port Mafia
He hates his nature as an omega though and refuses to team up with an Alpha
That's why he wants to be strong
And doesn't want to be anyone's mate
Aaaand that's why he hates Dazai
Because he's an Alpha and keeps mocking at him
But Dazai starts to show respect towards Chuuya as an omega, because he's strong and has morals and personality...
...and he's not like the other Omegas who's goal is only to find an Alpha that takes care of them and will mate
And that's when they start to fall for each other
Chuuya refused to team with and Alpha but he gets used to Dazai's presence
When people start calling them soukoku, they don't know that Chuuya is an Omega
He actually prefers when people suppose that he's an Alpha
"We make a pretty good team, hatrack"
"Shut up, mackerel" but he hides a smile
Chuuya never worked with another Alpha since then
After 4 years, when they finally become a team again, even if for one night, all the repressed feelings come out
Dazai properly starts courting Chuuya
But like, he's afraid that Chuuya will have a bad reaction since he despises his nature etc, so he does it in a "soukoku", subtle way
Chuuya is dense as fuck but he slowly gets it
Dazai is the supreme king of poker face but inside he dies a little every time he can make Chuuya blush
Honestly they are two dorks I love them
When they start dating, Chuuya is very aware since he's not very... used to... dating and courting and thing like that
They start with little things
Dazai compliments Chuuya more
Chuuya glares at Dazai more
Their smiles become more soft
When they share their first kiss, they both feel like they touched the sky
Both of them never received love, and they never loved before, so everything is kinda overwhelming, but in a good way
Even though they live in a world where Alphas are in control and Omegas are only used by them, they silently promise to take care of each other
One day, at the Armed Detective Agency, Dazai receives a call from Kouyou
With the coldest voice he ever heard from her, she said "Come here. It's Chuuya"
Dazai in there in five minutes
He finds Kouyou waiting for him. Dazai is keeping his cool expression, but his voice is worried "Where is him? What happened?"
Kouyou doesn't respond, instead she brings him inside a room, where on the bed sits Chuuya, with his gaze lost
He doesn't notice Dazai, until he looks up. Dazai comes right in front of him, his eyes looking for any kind of problem that made Kouyou call him here. There's the sound of a door closing, but Dazai hears only Chuuya's voice as he says in disbelief "Dazai..."
He doesn't have the time to ask before Chuuya takes his hand and gently places it on his womb, still looking lost, "my heat hasn't come in a while, I thought I was just sick but..." his voice trembling and unsure
He doesn't speak a word after that, but it's not necessary.
Kouyou has never saw that expression on Dazai's face, a mix between shock and something else, more fond.
He hugged him tightly, pressing soft kisses all over his face
Ignoring Kouyou's presence right behind them, he pressed a light kiss on Chuuya's belly, while still trying to elaborate the announcement
"You have to hide it" said Kouyou with cold, sharp voice. "It's incredible that they haven't found out your relationship yet, even though I wouldn't be surprised if Ougai-dono knew about it and let it be". Dazai and Chuuya were listening closely to her, but then she added "It's already a miracle that Chuuya became an Executive Member, if Mori finds out that he's pregnant, I don't know what he will do".
All the Executive Members were Alphas, so it was really incredible that among them there was an Omega, but Mori was well aware of Chuuya's powers. If he discovered he was pregnant, and couldn't neither work or fight, he was useless.
Dazai's voice was calm, but cold as ice "Mori-san will have to pass over my dead body before he even dares to touch Chuuya or the baby."