Weird World? I’ve Already Beaten It

That night, the eerie descended upon the world, changing everything as we knew it.
Now, eerie dungeons appear everywhere.

Some, with overwhelming strength, punch sinister spirits into oblivion, snatching up rare gems dropped by the enemies.
Others, with astounding intellect, clear dungeons with their wits, claiming immense wealth hidden in treasure chests.

And Chu Yu—he looks like a clueless, harmless college student, seemingly too weak to hurt a fly—yet he scoffs at both of those approaches...