After ruling the underworld for ten thousand years, the powerful demon king Oh Kangwoo returns to Earth only to find it transformed. Now, he must navigate an MMORPG-style world overrun by dimensional rifts and monster-hunting players.

Stripped of his demonic powers upon arrival, Oh Kangwoo must start from scratch in this new game-like reality. To survive the dangerous dungeons and hostile players, he is forced to adapt quickly and level up using his core underworld instincts.

The After Ten Millennia in Hell manga follows his ruthless climb back to the top as he exploits this system. He soon discovers that climbing the ranks in a human society of hunters might be more chaotic than ruling Hell.

Oh Kangwoo, the demon king of Hell, returns to Earth only to find it transformed into a game-like RPG in After Ten Millennia in Hell.

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