The beautiful married woman Reika, admired by everyone in town. To her husband, she appears the picture of loyalty and grace, quietly stirring the heart of her neighbor, Koichi. One day, after an accident leaves Koichi injured in both arms, Reika offers to help him with his insurance paperwork and invites him to her home. Nervous yet excited, he arrives only to be met with a shocking sight—Reika riding a man, thrusting her hips wildly in passionate motion. Koichi is stunned, overwhelmed by the contrast between this fiery, uninhibited woman and the gentle, cheerful neighbor he knew. That evening, Reika invites him to dinner, setting the stage for an unexpected turn of events.