Eiya~☆'s feed

Okay this suddenly popped in my mind and i don't know the title. I read this manga yaoi where its an a/b/o world. The omegas have their separate place. This place has literally 0 alphas, and only omegas are allowed to enter (i guess) and outside of the place is full of alphas and betas, idk i guess omegas can live there too? Please help TvT really means a lot(~´ω`)~