Mukuchi de Nuganai Kanojo no Himitsu: MasPet Nanapii

At a certain establishment, our MC is enjoying the services provided by one of the girls who works there. She’s cute, hot, proactive and skilled, but she has two strange things about her: she barely speaks and refuses to get completely naked, even when servicing customers. Our valiant MC decides to use his skills in bed to make her break character in both of those points. Will he succeed?
(Source: Fakku!)