Sakuraba Ogawa, the direct disciple of a certain bandage spirit who jumped off a building, a native of Yokohama, due to unspeakable reasons, became a police academy student and made five close friends who were also police (future) academy (copy) students. After this experience After his friends died one after another within a few years, he reversed time and space on his own. After countless efforts, he obtained the famous equation 5-4=0. At the cost, the existence named Sakuraba Ogawa was forgotten by the world.
Intention: Aren't close friends meant to be?