A man who happens to be living with his wife's younger sister Yukino, who can no longer resist his sense of color, seeks her out while she is taking a bath. The man, who cannot stand the scent of Yukino's body, seeks her out while she is taking a bath. He presses his sister-in-law, who is too weak to refuse, close to him in the small bathroom. Yukino herself is soon awakened to the pleasures of the man, and she begins to seek him out....
