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？ (Naze Boku no Sekai wo Daremo Oboeteinai no ka?)
- Action
- Fantasy
- Sci-Fi
- Episodes
- 12
- Duration
- 23 min per ep
- Aired
- Jul 13, 2024 to Sep 28, 2024
- Status
- Finished Airing
Synopsis
Humanity once survived a brutal war against four dominant races—angels, demons, the undead, and humanoid beasts—only because of the hero Sid, who overcame their champions and sealed their forces within four pyramids. Long after Sid faded into legend, Kai Sakura Vento serves as a conscript assigned to watch over those pyramids, wary of what might happen if the ancient enemies ever break free.
During a quiet day with his friend Jeanne E. Anise, reality abruptly “overwrites” itself, leaving Kai stranded in a world where demons have nearly wiped out humanity and driven the survivors into hiding. Worse still, Kai has been erased from everyone’s memories; even Jeanne—now a key figure in the local resistance—doesn’t recognize him.
Searching for answers amid the remnants of what he once knew, Kai discovers Rinne, a mysterious girl imprisoned inside one of the pyramids. After coming into Sid’s fabled sword, Codeholder, he frees her and allies with Rinne and Jeanne to challenge demonic rule. To reclaim the life and world that vanished, Kai must uncover what caused the reality shift in the first place.
Otaku Consensus
Why Does Nobody Remember Me in This World? lands as a divisive but legible Project No.9 genre piece: its high-concept alternate-universe mystery, Tatsuma Minamikawa's forward-driving direction, and the better action sequences give the 12-episode run more momentum than its 6.23 MAL and 62/100 AniList scores suggest. The verdict is limited by consistency: critics and viewers repeatedly split over the visuals, with the harshest reviews saying the story survives on paper but not always on screen, while others point to rushed pacing and a dry stretch in the middle of the season.
Why You Should Watch
Watch this if you want an alternate-universe war mystery that moves like a console RPG campaign: factions, sealed legends, weapon lore, and boss-tier confrontations arrive quickly, without a 24-episode runway. It scratches a bit of the same itch as Re:Zero’s reality-dislocation anxiety and Seraph of the End’s humans-on-the-back-foot combat, but with a stronger fantasy-SF blend: swords and guns share space with demons, angels, undead mythology, elves, fairies, and kemonomimi-coded races. The best audience is a viewer who prioritizes lore escalation and dramatic reversals over pristine consistency; Project No.9’s action highs and Jin Aketagawa-supervised soundscape carry the momentum even when the season compresses material. If a modestly scored show with an aggressive hook and end-of-world stakes appeals more than prestige polish, this is the exact niche.
Key Characters
- KKai Sakura Vento
Kai’s appeal is less raw power fantasy than persistence: he operates like the audience’s continuity error, using soldier habits and remembered history to interrogate a world that refuses to validate him.
- JJeanne E. Anise
Jeanne gives the series its sharpest emotional friction, because her presence turns familiar bonds into tactical distance rather than simple reunion comfort.
- RRinne
Rinne functions as the show’s mystery engine, balancing vulnerable outsider energy with enough mythic weight that every explanation around her feels provisional.
- SSid
Sid is the absent measuring stick for the cast, a legendary hero whose legacy shapes the military and mythological logic of the setting more than any standard mentor figure.
What Makes It Stand Out
- 1
Project No.9 produced the series as a compact 12-episode single cour, and viewer reactions most often single out its action scenes rather than its quieter transitional material.
- 2
The show crosswires fantasy and science fiction at the tag level: AniList marks Alternate Universe at 100%, Post-Apocalyptic at 65%, and gives both Swordplay and Guns 50%, placing it between portal-fantasy, military SF, and monster-war fiction.
- 3
Tatsuma Minamikawa directs with Satoshi Sugisawa handling series composition, which gives the season a clear forward mystery but also feeds the common criticism that the adaptation feels compressed by the finale.
- 4
Its visual reputation is unusually polarized: one December 2024 review argued that the story could not overcome bad animation, while other viewer reviews praised the action animation and background music as the show’s strongest assets.
- 5
MAL lists the series under Action, Fantasy, and Sci-Fi with no formal theme, while AniList’s tag spread highlights a much denser creature-lore mix including demons, angels, elves, fairies, undead, and kemonomimi elements.
Fun Facts & Trivia
- Fun fact 1
- The anime finished as a 12-episode TV run airing from July 13, 2024 to September 28, 2024, making it a complete Summer 2024 single-cour entry rather than an ongoing adaptation.
- Fun fact 2
- Kei Sazane is credited with the original story, while Hiromi Katou handled character design for the anime version under studio Project No.9.
- Fun fact 3
- Jin Aketagawa served as sound director, a notable credit given that positive viewer comments specifically called out the background music even when overall reviews remained mixed.
- Fun fact 4
- The production credits include several international animation names: Kennedy Freeman worked on 2nd key animation for the opening and key animation for episode 12, Frank Okako contributed key animation to episode 7, and Theo Kowal contributed key animation to episode 12.
- Fun fact 5
- Database reception places it in cult-interest territory rather than breakout-hit territory: MAL records a 6.23 score from 54,978 votes with popularity at #1857, while AniList lists 886 favourites.
Studios
- Project No.9
