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？) is a Japanese light novel series written by Kei Sazane with illustrations by Neco. It was published under Media Factory's MF Bunko J imprint from July 2017 to August 2020. A manga adaptation illustrated by Arikan was serialized in Media Factory's Monthly Comic Alive manga magazine from February 2018 to October 2025. An anime television series adaptation produced by Project No.9 aired from July to September 2024.
Plot
A war between five races for supremacy on Earth is won by humanity, led by the hero Sid. Suddenly, history gets overwritten so that Sid never existed, leading to humanity losing and becoming subjugated by the other races. All of this is witnessed by a boy named Kai, who is mysteriously unaffected by the alterations. In this new world, Kai finds that he never existed previously, so no one knows him. After meeting a mysterious girl named Rinne, Kai is inspired to become the hero himself and free humanity.
Characters
- Kai Sakura-Vento (カイ・サクラ＝ヴェント)