Maou no Ingu

Norio doesn't have any friends, just go to school and come back home every day.... But one day, his life dramatically changes after he meets a mysterious girl. She gives him a book and he gets a special power to invent various items by reading it. Yes, his school life is changed.... With erotic items, he makes female students his sex slaves one by one. No one can stop it....[From ErogeShop]