In the casual days of the spring of his third year in middle school, Mitsuru Hibino meets transfer student Kouzou Issha, who develops his special power. Issha commands Hibino to use his lethal “power” to “correct the errors of this world”.

Their first step is to “kill those who drive while using their cell phones”. While getting their hands dirty with what society considers “crime”, these boys use their “power” for their “ideal justice”.