Shiori, a big-breasted girl with glasses, is a student aiming to enter medical school. In exchange for "backdoor admission," her tutor makes her give him a titjob, breast-feeding handjob, and even cum inside her! She can't tell anyone about the rape... and to make matters worse, her stepfather sees the scene, and her stepfather, unable to control his desire, devours her big breasts and violates her.