I can't remember what the name of this manga is?

There's a wolf spirit girl (can't remember what they're called) and she's the last of her kind. Her childhood friend forgot about her when she healed him, because he defended her when they were little. He starts to get his memory back, and some of the characters are a demon king, a little warrior girl with him that he loves (her name is Momo), her dog that eats and spits up anything, the demon king's two body guards (one is tiny and goes evil when you call him weak), the guy who raised the childhood friend (of whom only likes pretty people), and the girl he likes who is acquainted with the demon king. They are all trying to find the wolf spirit girl. The childhood friend slays demons, but there are two different kinds of demons, the human ones (demon king and body guards), and the monster ones. He slays the monster kind. Do you know this manga?