Saori, my mother's close friend, fled her home after a marital argument and temporarily moved in with my family. For Koichi, who has had little interaction with women outside his mother, Saori becomes his first encounter with the opposite sex, bringing fresh excitement. Drawn to her big tits, Koichi begins fantasizing about their softness and touch. Unable to satisfy himself with just looking, he eventually starts peeping on Saori while she bathes. Entranced by her body, the desire growing deep inside him intensifies each day, becoming increasingly uncontrollable.