Sato has a crush on a married woman who lives nearby, Rin, a voluptuous wife with impressive breasts. Sato has been finding excuses to visit her, hoping to get closer to her. Today, he goes to see her with a souvenir from his trip, but something seems off. Despite not getting a response when he presses the doorbell, the front door is unlocked and ajar. Worried that a burglar might have broken in, Sato rushes inside, only to be greeted by Rin's alluring, lustful demeanor and her incredibly heavy breasts...