Mitsuyo Shono maintains her daily jogging routine without fail. Her modest yet well-shaped breasts and soft, jiggling buttocks with each stride deeply stir the desires of Tatsuya, her unemployed neighbor who has long been obsessed with her body. One day, while Mitsuyo's husband is away at work, Tatsuya sneaks into her home, seizing the chance to force himself on her. In that moment, a mix of long-forgotten pleasure and forbidden thrill overwhelms them both, creating an unforgettable experience filled with creampie intimacy.