The main character of the story, Ryohei Takamiya, is a student with outstanding academic performance and is a talented tutor. He was invited to become a private tutor to teach Maria, the daughter of a high-ranking noble who recently died. What awaits mc is hard sex with three incredible beauties, Mari Mamiya is a widow and now the head of the Mamiya conglomerate. She is the busty mama and owner of the Black Roses estate, where she lives with her daughter. Maria is Mamiya's daughter and heiress. She is beautiful, but also a spoiled brat. Usually when a girl a reached maturity or certain age, they'd send to the black roses main house, there was unknown reason why Maria is still sticking with her mother. And the last is Ira, the busty and mysterious servant Black Rose house.