A mysterious package arrives from a neighbor, and Maki Amamiya, having no idea what it could be, opens it out of curiosity. Inside, she finds an adult toy. Though she suspects it's a prank, she becomes intrigued and starts touching herself with it, quickly losing herself in masturbation. Unbeknownst to her, her neighbor is secretly watching her every move. When she realizes she's being spied on, her arousal intensifies, and she begins craving more, willingly exposing herself to him. An erotic story filled with voyeurism, desire, and creampie-filled encounters.