Ah... Unfortunately I don't think there is any original manga with an omegaverse plot. But if you don't mind djs, I think you'll find a few of them at least. There are also fanfictions, and I'm pretty sure there are several of them in most of the average to large fandoms.
Sorry if I wasn't of any help (￣∇￣")
...Actually, have you ever read Sex Pistols ? I forgot about it but if I remember right it's got kind of an A/B/O context
No no don't worry it's okay :) Thank you!! I know sex pistols but it's still on-going. XD
Guys can you plese recommend me some omegaverse yaoi manga? Completed and happy ending please.