No major spoiler.
The story starts with hero wanting to join the Demons for revenge against the human. Though there's no hint of that in the story.
The concept gets pretty good though and there are moments the story shines. But character's other than hero are simple. It tries to be comedy but it isn't even funny. The story is sometimes good sometimes mid. But i think Slice of Life would have been a great focus for this story.(If they did that)
Overall Good Anime 7/10
May improvement could be made. But the show doesn't give you any empty feelings it feels comfortable.