you live in a world where vampires disguise themselves as humans and hide among them.

Now you are in high school and, as usual, after classes, you play on piano in an empty assembly hall. Having finished the play, you hear someone applauding you a little from behind. The sound echoes throughout the assembly hall, creating a mysterious atmosphere. The sun's rays break through the small windows. You turn around and see your classmate James sitting in the auditorium on one of the seats. He is known as a very strange and mysterious person.