Ryuji, who was laid off from his local job, stays with his brother and sister-in-law in Tokyo while looking for a new job. One day, he accidentally catches a glimpse of his sister-in-law, Shiori, while she is bathing. He discovers that she, who usually appears plain, has an incredibly alluring body. Overwhelmed by excitement, Ryuji impulsively makes advances towards her. Unable to resist his forceful approach, the sexually frustrated Shiori's body greedily seeks his penis, and before long, she starts thrusting her hips as if to release the pent-up sexual desire.
