Gravure idol Yamate Ria is said to have the best proportions in the industry. But she has a secret. In order to get work, she is having an affair as the producer's mistress. And on these adulterous trips, her embarrassment gradually changes to pleasure as the perverted producer uses bondage play, toys to tease her, and drinks her. By morning, she has been trained to seek out his penis herself. A beautiful woman who accepts all of his sexual desires in a win-win mistress contract.