You are reading The Last Rebel: The Savior Android Levels Up and Changes the Future Chapter 21. The year is 2025. Aliens invade Earth, triggered by the arrival of a comet. To counter the sudden invasion, humanity develops the anti-alien weapon known as the “Synthetic Human” (or “Android” ), but ultimately, they are wiped out. Time passes, and we find Rihito , a Synthetic Human living alone in