Stay With Me αβΩ

Being born from an Alpha and Omega also known as 'royal blood' or simply 'royals' is very rare and rapidly declining as Betas start to dominate the current times.

α + Ω = α or Ω
α + β = β
β + Ω = β
β + β = β

In a world where Alphas and Omegas are the two classifications that are rare and have abilities while Betas are the majority of the population and are ability less, some people aim for greater power and success. One in particular is the Port Mafia, a vicious group of Yokohama which is lead by the Alpha male named Mori Ougai.

Mori wanted to have a successor for the position of being the leader of the said underbelly group, sure he could leave the company to his "trusted" and first executive Dazai Osamu as he is also an Alpha but something in his mind doesn't make him settle with that decision. He wanted someone who is related to him by blood, with that being said he needs an Omega to fulfill such an aim.

Dazai Osamu and his partner Sakunosuke Oda were tasked to find the boss an Omega, a task that is not very easy to accomplish as they are rare and one can think that they don't exist anymore.