there several probability, either alpha male x alpha women as normal relationship(tough hard get baby), or male x male with the same context as homosexual in real life(so just spent their lust). there probability that this manhwa adapt rule that alpha x alpha possible too. cos i ve seen so many omegaverse with some different rule, like omega who marked possble get sex with other, etc.
In omegaverse, alpha, beta and omega can all get pregnant. It's a world where all can impregnate and be impregnated.
Alpha is the highest in social ranking with the highest chance of impregnating due to their amount of sperm. They have the same chances with beta when it comes to getting pregnant.
Omega is the lowest in social ranking with the highest chance of getting pregnant and the lowest chance of impregnating.
It's the same with either men or women. There are alpha women who impregnated their omega men so the men is the one who gave birth.

I can see how he has sex with a beta but how is it possible for two alphas? Aren't they both dominant tops? Unless this story is those special ones where there are some alphas that like to be topped???
Am I thinking too deep? (⊙…⊙ )