Well I take that back. It's Omegaverse, but an origin story of how it started.
I didn't think it was. I had a theory going that the male pregnancy thing was caused by the pharmaceutical company and they built a cult around that.
I remember reading another manga's premise for why the ABO spectrum happened and it was pretty much the same; nature responded to low birthrates. However the one I read was more like due to less and less females not being born the ability to sire and conceive was spread out to the opposite sexes as secondary traits.
Well I take that back. It's Omegaverse, but an origin story of how it started.
I didn't think it was. I had a theory going that the male pregnancy thing was caused by the pharmaceutical company and they built a cult around that.
I remember reading another manga's premise for why the ABO spectrum happened and it was pretty much the same; nature responded to low birthrates. However the one I read was more like due to less and less females not being born the ability to sire and conceive was spread out to the opposite sexes as secondary traits.