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The raid failed. In a desperate situation, facing the dungeon boss’s self-destruction, Lee Geonwoo is left alone in the boss room due to a teammate’s betrayal. Just when he thought everything was over, he coincidentally obtained a dagger. Afterwards, his life completely changes... He managed to save his life, but his hard-earned level returned to 1. -’Mosquito’ has been caught. -Level has increased. It’s clear that the level has increased, but why does the level remain the same?