Mari's mother remarried, and she ended up living with her stepfather and stepbrother. By coincidence, her new stepbrother attended the same school as Mari. Her gentle and gentle stepbrother gradually revealed his true nature as they lived together. He masturbated to Mari while she was asleep, and when his sexual desire could no longer be contained, he raped her at night. Mari was violated relentlessly around the clock, even at school! Mari's mind refused and her body climaxed, and she would never give in! This is the start of a new series of heinous and cruel acts with no way out!