Amatsuki Iori, a high school student, was summoned to a foreign dimension as a savior, but in a treacherous twist of fate, his trusted companions turned on him and ended his life during his quest to save the land.
Bewildered and believing himself dead, Iori suddenly regained consciousness only to find himself summoned back to the same realm, but in a future time.
Once again, Iori is called upon to defeat the demon king, a task his previous self failed to accomplish. However, among his new comrades-in-arms, he spots a former ally who had betrayed him.
Sworn to revenge and consumed by hatred, Iori encounters a formidable foe: a girl who happens to be the former demon king, also seeking retribution.
Together, the former-heroes-turned-enemies embark on a new mission, fueled by vengeful desire and a hunger for redemption.
