Shio has entered a period of fatigue and fallen into sexlessness with her husband. Her sexual frustration has reached its limit, and she becomes so absorbed in her solitary lewd play that she forgets to lock the door. Just then, her neighbor Satoshi arrives with travel souvenirs. To ensure Shio's safety, Satoshi bursts into the room and sees Shio's face contorted in ecstasy. Each time she shudders with pleasure, her breasts shake and bounce wildly. Satoshi, who has been secretly interested in Shio, watches her unseen lewd state, and his love goes out of control.
