Ayyy Have you guys seen this? the name of is Anti-musume · Kusetto # 1 "Gaiden · Succubus illusion (fantasy)It would appear someone has actually made a Hentai animation of the Monmusu quest or perhaps its actually a game I really don't know but it looks pretty dope:
I apologize for not having any more information besides the link I never learned to speak moon. Nevertheless check out the trailer they provide!
It looks very interesting, the story does not seem to follow the path of the original and there seem to be new Monster girls.