Virtuous beauty Reiko warmly welcomed her shy son's classmate—the first friend he had ever brought home after transferring schools—with a bright smile one afternoon. Carrying homemade cookies and juice, she knocked on the door of her son's study room, exposing her defenseless body before the two boys standing inside. Captivated by her beauty and innocence, the boys stared intently, their gazes growing increasingly lewd and obsessive. Reiko's kindness and pure intentions unknowingly ignited their hidden desires, setting the stage for an escalating series of events.