After losing her mother, Ran lives alone, with her father constantly absent due to work, deepening her loneliness. She spends her days lost in fantasy, frequently indulging in masturbation as she imagines encounters with older men. One day, her neighbor Masakazu visits, bringing her a gift of leftovers, then lures her into her bedroom and starts having sex with her. From that moment on, Masakazu's male relatives begin taking notice of her, drawing her into an increasingly depraved lifestyle. As loneliness and fantasy collide, her life takes a sudden and sensual turn.