Mio Kimijima, a beautiful wife, started thinking about having children calmly in her marriage in the apartment complex. However, instead of making a child, her husband was reluctant to work night shifts, and his attitude sparked her sexual desire daily, leading her to occasionally resort to self-pleasure. One afternoon, while gazing upward as she caressed her sensitive areas, she saw her middle-aged neighbor, Takeshita, who appeared in an emotional greeting, through the window. The two, who should have never met, would share an experience that left them both sweating after witnessing this act of masturbation.