A so-called rich-type middle-aged father who succeeded at work. Although he lives in a magnificent mansion with money, his wife evaporates with a young man and spends lonely days. The betrayed man's eyes are empty and like a glass ball ... A man who can do nothing but work decides to hire a maid, but the innocent white girl who appears there grows abnormal sexual excitement and trains and dyes it to an absolutely obedient maid of his choice. "Riko" is a metamorphosis that escalate day by day.