Please help me find this manga. I read it a while back and can't remember the name of the manga. Its about a demon king/prince who came to earth with his female love interest. I don't remember clearly why he came to earth maybe to escape his killer. The female love interest can turn into a black cat or a human at will. While on earth the demon king was transformed into a high school boy and he had a big tattoo mark on his back. Some of his henchmen and his killer also came to earth to look for him but because he look like a high school boy, they have to identify him by the tattoo on his back.