Overlord, Vol. 1 by Kugane Maruyama

The Undead King

After a beloved virtual reality game is supposed to shut down, a veteran guildmaster remains logged in and awakens in a strange world inhabiting his skeletal overlord body, with his guild’s NPC guardians now self-aware and devoted. Determined to uncover whether other players were transported too, he assumes the name of his guild, consolidates control over the Great Tomb, tests the limits of his power, and begins a cautious campaign of information gathering—intervening in a nearby village, gauging the world’s magic and politics, and laying the groundwork for a grand plan that blurs survival, ambition, and dominion.

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