Prequel: this is the witch x dog familiar story. Gives us their background story on how they met and why the uke witch wanted to save his father so much by forcing a contract with the witch from the second couple. But that story takes place years later down the line. In this story, they just contracted, and the seme still has 6 lives. In the sequel after the other cat familiar seme beats the shit out of him, he only has 1 life left.
Majo no Inu