Mariko lost her husband in an accident and became a widow. Although she lives comfortably off the inheritance her husband left her, the loneliness she feels is not filled... Mariko escapes into pleasure as if to fill the hole in Kokoro, spending her days pleasuring herself. However, before she knows it, her actions turn into a desire for more pleasure, and she exposes her private parts on the veranda, not knowing who in the neighborhood might see, becoming intoxicated with pleasure and sinking deeper and deeper... Then, one day, Mariko's lewd behavior is finally witnessed by a man from the neighborhood...