Pochi Kuroポチクロ; 波奇库洛

A human girl falls into the demon realm and can't seem to communicate with the local demon Kuro who found her. Humans are rare in the demon realm and many would love to eat a human. However, Kuro ends up falling in love with her and names her Pochi! Kuro decides to help Pochi get back to the human world and protects her from demons that try to eat her. She ends up being able to at least understand them but still can't speak the same language. She meets a demon prince who also shows interest in her as well and their long journey back to the human world begins.