Sayaka's only child is her son, Hitoshi, a timid boy who is constantly bullied by his friends. Worried about him, Sayaka decides to confront his friends and put an end to the bullying, but unexpectedly falls into a trap set by the group of precocious boys. What follows is an unforeseen turn of events. Overpowered by the boys' intense sexual desires, Sayaka is forced into becoming a sexual outlet, made to perform sexual acts while her own son's body is used against him. Despite constantly thinking of her son and wishing for his happiness, the situation only grows worse. Desperate to protect her son's future, Sayaka struggles to find a way out—but what awaits her in the end remains unknown.