Kiyohiko, a law school dropout, spends his days immersed in exam preparation, yet finds a certain pleasure in secretly observing the life of his neighbor, married woman Haruka Minagawa. His gaze gradually penetrates deeper into her daily routine, sparking an intense curiosity about her private world. One day, Kiyohiko unexpectedly discovers Haruka's hidden secret. In that moment, he becomes aware of her deep-seated sexual frustration and the way she deals with it. The sight shocks him, yet awakens an entirely new desire within.