Why can't he be my love? (Yaoi story/mpreg)

In a world where women became extinct because of the first tribe of homosexual men. Men evolved to have the ability to bare children. Now only some men have this ability. They look a bit more feminine and have the motherly nature to them as well.

Breeze, the son of the chief must find a lover to stand by his side and bare his children. But none of the available men are to his liking. His birth father, a gorgeous man with long locks of hair tells him that special someone will come. So does many others in his tribe.

A young man from a different tribe has suddenly appeared in Breeze's tribe. He's quickly taken as prisoner. He's a warrior, most likely not a birth father (a man who can bare kids). But he's just so adorable and beautiful, especially to Breeze. But there's one problem. They are forbidden to mate.