Mm.. Basically The omega was the second person in Place.. His name is Shusai and The Alpha at the top.. His name Jin..
Jin has an interest in Shusai.. But Shusai doesn't. Jin finds out that Shusai is an Omega and blackmails him to fck with him in order to keep Shusais's secret..
And that is where their love story begans..
Also I honestly Ship Arata and Kou.. It's also not sure if Kou helds feelings for his brother Rai.
Moreover it's a good story where Shusai dreams fulfill and also marries Jin (the ring explains all)
and the smut and moaning of the uké uff~>
Tbh there is no chapter without sex..
Zenbu, Ω na Ore no Sei.