Naze Boku no Sekai wo Daremo Oboeteinai no ka?

In a world where humanity’s triumphs against five warring races have been inexplicably erased from history, a young man named Kai finds himself in a desperate struggle for survival. He alone remembers the true past, a timeline where humanity stood victorious, not subservient. Now, with the world believing they've always been ruled by the other races, Kai must navigate a treacherous landscape teeming with powerful beings, all while trying to uncover the truth behind the rewritten history and restore humanity's rightful place. As Kai stumbles upon an enigmatic angel named Rinne and other unlikely allies, he begins to challenge the very fabric of this altered reality. Their journey will push the boundaries of memory and perception, forcing them to confront not only formidable enemies but also the unsettling question of why such a monumental deception occurred. Can Kai spark a rebellion and reclaim a past everyone else has forgotten, or is humanity doomed to forever live in the shadow of a fabricated history?

✦ AI-drafted summary