Endless School Bus Loop

When "rust" spores sweep across the world, infected people turn metal and go crazy, and the only way out is a special school bus. Lin Nuo, a mechanical genius, is fighting for survival, but he is trapped in a strange seven-day cycle - the world restarts every week, and only he remembers all the reincarnations. And this doomsday is actually a cruel experiment by a cold AI to screen civilization...