It means that "A Pervert and the stony cat" shortly written as Henneko in Japanese. It's a story involving a school boy who wants to fantasize women and girls openly and a girl who thinks that she expresses too much of her emotions to other people. They both strike a bargain with a stony cat who is known to give them what they need by taking what they are willing to give up about them. This TV series is all about trying to gain back what they have renounced to the cat.
Youto Yokodera and Tsukiko Tsutsukakushi go to a Japanese-style animal cafe, when at the cafe they find Azusa Azuki working there as a maid. Youto Yokodera later asks Azusa Azuki on a date and shows her how much fun the commoner's life is.
Youto Yokodera apologizes to Azusa Azuki and manages to get his facade back. Azusa Azuki asks if Youto Yokodera could go somewhere with her and just the two of them. Tsukiko Tsutsukakushi remembers a time she met Youto Yokodera.
Youto tells Tsukushi to seduce his twin brother although he hasn't got one. Youto wishes to see Azusa in a bikini, so she is transported to his location. Tsukushi tries to seduce Youto thinking that it's his twin brother but he stops her.
About a 17 year old pervy boy who hide behind a facade. On eventful night, He sacrifices his facade to a cat shaped stone.He meets a girl who sacrifices her expression to the cat as well. Going on an adventure to get back the sacrifices after things go wrong, they find love, deceit, revenge, comedy, romance, suprises and more along the way!