Ayako Inoue lives alone with her son, and after a long period without any male companionship, both her mind and body are filled with loneliness. One night, her son's friends come over to stay the night. One of them accidentally discovers Ayako secretly masturbating and uses the secret to blackmail her, threatening to tell her son unless she submits to him. He then forces himself on her. Soon, another friend joins in, escalating their demands with increasingly lewd acts. Though she resists mentally, her body betrays her, responding intensely to the overwhelming stimulation and driving her to multiple climaxes.