Okay, here's what I think happens.
Hero goes to fight Demon King, DK netorares the hero and turns his lover into a Demon Queen, Queen kills hero and absorbs his soul, the DK gets her pregnant and the Hero turns into a girl, becomes indoctrinated, and is now her/his dad's new loyal servant/fucktoy.
Did I get that right or am I missing something?
Hero goes to fight Demon King, DK netorares the hero and turns his lover into a Demon Queen, Queen kills hero and absorbs his soul, the DK gets her pregnant and the Hero turns into a girl, becomes indoctrinated, and is now her/his dad's new loyal servant/fucktoy.
Did I get that right or am I missing something?