The first one is about a hero in a fantasy world who come across a village full of women who might be beast women, elves or humans I can't remember but he has sex with them all and gets them pregnant then years later him and his children defeat the demon lord
The second one is about school boy or teacher that goes to a kids house who has shut themselves in the room and refuses to come out the guy the kids mom eventually have sex and then the kid eventually comes out and turns out to be a girl and has sex with him too