Pretty much an old doujin I once read.
Premise was that a guy makes a deal with a demon girl for a big dick and uses it on her before she can claim his soul so she leaves. Her older sister comes does the same thing but manages to drag him with her to the underworld. The demon king wants the soul but his wife wants him as her new toy which he agrees. Later on it turns out the guy has super holy blood which makes him powerful and he fucks the women again, dethrones the king and takes over and has sex with different kinds of demon girls including the mother and two demon sisters.
Anyone know the name?