beymad_1804
If the protagonist says that in dxd they have their direct bloodline and not from other phoenixes, And he himself does not know the reason for that, adding the fact that his wife had told him that he could have a harem, Doesn't it mean that the protagonist's wife at some point went to dxd thousands of years ago and had a lover? Reason why his wife would be the ancestor of the phoenix clan? In turn, since in theory she was unfaithful to the protagonist, for that same reason she also allows him to have a harem? Since you feel guilty for your infidelity and to feel less bad, do you want your husband to have other women too?