What's Our Hero Doing?

Our protagonist, who has mastered the notoriously challenging "Vanta Black Ring" game a thousand times over, finds himself unexpectedly transported into the body of "Ordinary Villager A (Hans)" - a minor NPC in the game's tutorial village. Just as he begins to adjust to his new life as a background character, the village comes under attack by monsters. As chaos erupts around him, he realizes that his extensive knowledge of the game might be the key to survival - but in this world, the rules don't seem to play out exactly as he remembers. Now, instead of watching the story unfold from the sidelines as he originally planned, he must navigate a reality where his gaming expertise and quick thinking are his only weapons against an unpredictable fate. (Source: Kakao Entertainment, translated)