The wish-granting Stony Cat takes a trait that you no longer wish to possess and bestows it upon someone who needs it. This is great news for Yoto, who is a perverted school boy plagued by his inability to express himself. He wishes to lose his facade, only to meet Tsukiko who wishes to be more discreet. They get what they want and discover they don't like the new versions of themselves. They work together to return to normal and avoid mishaps along the way in Hentai Prince & The Stony Cat!