Akihiko, who quit a major insurance company and started working at the factory of his father, Takashi, is attracted to the sex appeal of his mother-in-law, Maiko. I found Maiko talking to a man I didn't know on the road and took a picture with my smartphone. Threatens, but is flatly rejected. Akihiko who resented gets an aphrodisiac and begins to train Maiko with a sex slave.