[Comic Edition 1-5 on sale (Ride Comics)][Book Edition 1-4 on sale (GC Novels)] Kuro Kousuke was a vengeful man. His twin sister met a tragic death, freezing to death after being raped. To avenge his beloved sister, Kousuke, who was only thirteen at the time, used every means possible. And over the course of five years, he accomplished his revenge. However, when he achieved his revenge, Kousuke, who had lived solely to kill the perpetrator, lost the will to live. So he tried to slit his own throat with the same knife he used to kill the perpetrator. But then he heard a voice. 'Isn’t this a waste?' When he realized it, he was no longer in the place, Japan, or the world where he had been. It was a different world where those who were unhappy in their previous life received powerful status adjustments. *Highest Rank [Overall] Daily 1st, Weekly 1st, Monthly 4th*