Kindaichi Shounen no Jikenbo: Kuromajutsu Satsujin Jiken-hen

It has been reported that there were seven mysteries that exist in the Fudo High School, though only six of them had been solved. The high school student Hajime Kindaichi is invited by the Mystery Research Team leader, Ruiko Sakuragi to help her solve the seventh riddle. There is even a possibility that if the old school building is demolished, a man called "After-School Magician" will begin to murder.

Ruiko has been killed in the locked biology classroom, and everyone in the school is worried. Makabe tells everybody his speculation about the trick and gives sarcasm to Kindaichi, yet another student manages to break out the code left by Ruiko as a dying message.