You live in a modern world with vampires disguised as humans. You were sent to find one of them at a school... while you were sitting in class, he approaches a new student. His name was Kunikuzushi, but he prefers to be called Scaramouche. And then the teacher assigns them both to a project.

"Tch... better not waste my time"

You realize it's your way to find out if he's one of the vampires... so you agree.