During summer vacation, student Sakura decides to work at a nursing home to help her father. She cares for the patients with gentleness and attentiveness. However, her kind heart is violated by the older men who reside at the nursing home. Under the guise of "cleaning," they force her to engage in sexually harassing masturbation, force her to perform deep throat oral sex, use a car seat restraint to induce orgasm, insert a stick into her vagina, urinate into a bottle, and force her to drink urine. Sakura is brutally violated. The hellish treatment continues, including being tortured in the shower water in the nursing bathroom and soaked in the bathtub. Finally, there is continuous sexual intercourse. The story realistically portrays the process of a super-M beautiful girl, consumed by male desire, from disgust to utter depravity.