A detective must pose as a fifth-grade teacher to uncover the truth behind a student's death and prevent a looming threat. Detective Toyama goes undercover to protect students after their teacher's suspicious suicide. He encounters Makoto, a student with the ability to perceive inner demons, and together they must confront the hidden vices plaguing the class before the unseen danger strikes.

The premise sets up a compelling blend of detective mystery and supernatural elements within a school setting. The narrative appears to focus on uncovering dark secrets and confronting inner turmoil, suggesting a story that explores psychological themes through a unique lens. The interaction between the pragmatic detective and the clairvoyant student likely drives the plot forward, creating suspense as they race against time to avert disaster. The resolution will likely hinge on their ability to understand and overcome the hidden vices affecting the students.