Shy and reclusive son Takashi shows no signs of improvement despite his mother Chisato's many attempts to cheer him up. One day, a note appears outside Takashi's room: "Buy me some porn magazines." Witnessing this firsthand, Chisato devises a way to reach her son's heart. To awaken his desires and demonstrate the allure of a real woman, she begins masturbating right outside his door, letting out loud moans he can clearly hear. Stimulated by her sounds, Takashi finally opens the door...