The town of Tsukimine is in terrible danger. Every month, on the night of the full moon, horrible demons try to conquer the town, and only the aloof, beautiful Sumire can stop them!
At least, that was what Sumire thought… until, on one moonlit night, she encounters a boy from her high school. This boy is called Yuuki, and he awakes to powers much like hers. Once ignorant of the demonic threat that plagued his town, he must now go toe-to-toe with these monsters, and prove himself to Sumire as a proficient demon hunter!
Yuuki’s quest won’t be easy, though… Will Yuuki and Sumire be able to survive this night? Who’s controlling these demons, and for what cause?