"Eroriman" follows a lonely middle-aged businessman who indulges in paid dates with high school girls via a shady app, only to discover his sweet, reserved niece Mifuyu auctioning her virginity there. Shocked yet aroused, he books her, skillfully seduces her inexperienced body, and claims her first time in a passionate encounter that awakens her hidden desires. As their taboo relationship deepens across four episodes from PoRO studio, boundaries blur with intense domination and big-tits action.