[DeepL Translation - needs review] Introduction to Volume 1: Death row inmate #042 (real name: Ryohei Tajima) is invited to participate in an experiment by a researcher named Shiina. Instead of abolishing the death penalty, he would have a chip implanted in his brain that would explode if he ever developed the desire to kill, and he would serve his community while being monitored. Tajima accepts the proposal, and ends up working at a public high school...
(Translator: DeepL)
