Kadokawa’s Monthly Comic Alive magazine published the final chapter of Arikan’s Naze Boku no Sekai o Dare mo Oboeteinai no ka? (Why Does Nobody Remember Me in This World?/ なぜ僕の世界を誰も覚えていないのか?) manga on October 27th, 2025.
The manga is an adaptation of the Naze Boku no Sekai o Dare mo Oboeteinai no ka? light novel series by Sazane Kei (Kami wa Game ni Ueteiru, Kimi to Boku no Saigo no Senjou, Arui wa Sekai ga Hajimaru Seisen). Kadokawa published Sazane’s first novel with illustrations by neco in July 2017, and the ninth and final novel in August 2020.
Manga author Arikan adapted the novel series into a manga in February 2018 in Kadokawa’s Monthly Comic Alive magazine. Kadokawa published the manga’s first tankoubon volume in June 2018 and the 13th volume in April 2025. The manga’s 14th and final volume is scheduled for release on November 21st, 2025.
BookWalker Global publishes the manga chapters in English under the name Why Does Nobody Remember Me in This World?, and it describes the story below:
“War between the five races on earth – the humans, the “Demonic Race”, the “Wild God Race”, the “Spirit Race” and the “Phantom Beast Race”- has ended in the victory of humans.
It is said that “Prophet Sid” had sealed the other four races in the black pyramid now called “Crypts”. Kai’s job is to watch the crypts and make sure that there is no change. He is also training to save humans when the other races break the seal and come back to this world.
The crypts looked quiet today…but after Kai felt the world bending in front of his eyes…everything changed. “World Rebirth” was activated…!! Now Kai is in a totally different world where no one knows him. But he remembers everyone!”
The original light novel series also inspired a TV anime directed by Minamikawa Tatsuma at Project No.9 studio. The anime premiered in Japan in July 2024, and all 12 episodes can be streamed on Crunchyroll under the name Why Does Nobody Remember Me in This World?.
[https://www.youtube.com/watch?v=DVtlcwWRaow]
