Morris: Tsuno ga Haeta Neko no Bōken

Morris, a cat with horns growing out of his head, had his life threatened by the empire, and after fleeing, he ended up in a certain wizard's house. He sets off on a journey with the wizard and his eight cats, hoping to cut off his horns, while the wizard wanted to become a dragon. What awaits them at the end of their journey? (Source: Kadokawa, translated)