Spurred by the memories of his betrayal in his past life, Kaito continues his pursuit to exact revenge on the adventurers who killed him. When he encounters Eumis, the sorcerer mastermind behind the betrayal, Kaito's quest for vengeance kicks into high gear.

Metalia ambushes Kaito just after he completes his latest feat of vengeance, forcing him through a portal back to present-day Japan. Stripped of his memories, Kaito comes to terms with his tragic new reality—a world where almost everyone he knows is dead and the police surveil him around the clock on suspicion of committing a heinous crime. Even this fragile status quo is disrupted when an assassin nearly succeeds in taking his life. But the brush with death restores Kaito of his memories and powers, giving him the perfect opportunity to take revenge on his assailant and chart a course back to his partners in crime…

Summoned to a fantasy world as a hero, Kaito Utage defeats the Demon Lord alongside a band of noble adventurers...only to be double crossed and brutally murdered by his former allies! But when a twist of fate gives him a second chance at life with his all his memories intact, he sets off on a quest to slaughter his traitorous party members one by one. "Come...let vengeance commence!"