Need help finding pls

So I read this manga a long time ago. Its main character was a teacher. I think he got fired from his previous job or was fresh outta school. He ended up getting hired to this school up in the mountains. He finds out that the kids he is teaching aren't actual kids but animals who gained human form. Every chapter focuses on the different characters and we find out that they were pets who were abandoned. I don't remember much but I do remember there was a cat, fox, bunny, and a dog or two. I know there were more but I just can't seem to remember them. Also there was a principal who was also an abandoned pet (maybe) but he doesn't make much of an appearance.