Humanity Transmigrates as a Group, but I Was Abandoned

Has the whole world forgotten me?

When everyone transmigrated to another world, I was left alone to protect Earth. When humanity returned and a great calamity struck, my legend began.

Earth was about to evolve to the next stage. To prevent humanity from going extinct, the gods sent all of mankind to another world already imbued with magic, so they could train there. But they accidentally left the protagonist behind on Earth, all alone.

To survive in the future, the protagonist had no choice but to train hard on this desolate Earth...

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.