Mistermd this are "Teisou Gyakuten isekai" .lliterally The World of Moral REVERSAL, basically a type of isekai of the World Upside Down, specifically sexual urges between men and women, sexual appetite of men and women are the opposite of whatit is in our world, porn hentai and erotic games are more targeted towards women preferences showing sexualized men, prostitution is usually seen as men's work, etc. Since the guy came from our world, he sells himself as a cheap whore to the girls, "you can do me however you want" for 3000 yens (21 dollars) what would you've done if you were on highschool and a girl told you you can fuck her for 20 bucks, even ejaculate multiple times in the same session? answer that and you'll get why this girls are like that for him.
Base +6, Der Hunter +6, artvrvs +5, coleccionista903 +6, 只是個中二病 +6