Seifuri Academy is a big and luxuarious school for famous and rich people. But the senior high building is seperate from the other year levels of the Academy. They can't go out of the campus until they graduate. 13 students, 5 teachers..... and a mysterious killer~ Yes you heard it right, a mysterious killer among them. But a young detective will dare herself to solve the impossible case...and unlock unknown histories of their parents? But who is the killer? And who can be trusted and not? And who's R?
3 parts