"Why did this have to happen to me?!" Hiroshi Uchiyamada, a middle-management teacher at Tokyo Holy Forest Academy, finds himself caught in the crossfire between his subordinates and the students as vice principal. One summer day, he ventures into Kabukicho to track down a runaway student, Nanami Hazuki. What starts as a simple search spirals into a breathtaking "nightmare" that will change his life forever! Prepare for an "extracurricular lesson" that transcends dimensions.