Responses
From the beginning few pages with the full Japanese explanation where sensei drew some helpful diagrams, it looks like betas are anatomically different from alphas. So it's not something he can lie about unfortunately. Either he has certain parts or he doesn't.
Its so sad :( i wish tsugitsugu is an alpha. I wonder he just lied about being beta. But it couldnt be too because usually alpha is so agressive. tsugit doesnt look like that.
Woah first time i read omega universe beside riren doujin this will be so hot! I wish for mpreg wuhuuu