This is a story about an angel legend.
The heroine was supposed to live in an ordinary high school life, just like ordinary girls, she had a crush on a boy and a good friend.
However, one night, she met a boy who claimed to be a real angel, and told her that she was a sleeping "devil angel" and that he was going to perform a mission - to destroy the demons sent by the demon world...
The novel is written around "magic" and "love".