UNMEI: Pantheon's Game - Chapter 63: Different

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.

Doomsday comes, and human beings enter the heavenly world.
Ten years later, Yang Chen, who was betrayed tragically, returned strongly with the Tianyu bug. In this life, he vowed to make the betrayal pay the price. He has a powerful bug bonus, just like an open hang. Frightened to hear…

- Description from novelbuddy

Edward, an 18-year-old college student, found himself stuck inside of a dark abyss.“Where am I?”[Spawning Dungeon Champion]“Huh?”Without a word of warning, He found himself in an unfamiliar body being forced to attack trespassers. Will he ever find a way out? Or will he be a tool for endless slaughter?Warning: Due to the nature of the novel the MC will be switching between bodies. That's why the status window was made the way it was. If that's not your thing you might want to skip this one. The progress is not reset though.

I returned after 10 years.