Trapped on the 100th floor of a forgotten dungeon... where growing stronger is the only way to escape.
What began as a simple mobile game turns into a living nightmare when Shimon awakens inside the Twilight Dungeon, a place ruled by Astaroth, the feared [Undead King].
In this new world, levels, skills, magic, and stats are real-a true RPG system where every battle means progress... or permanent death.
To survive, Shimon must make a desperate deal: trading the knowledge of his original world in exchange for his life.
But survival will not be enough. If he wants to escape, he must face monstrous enemies, master powerful magic, and accept that every victory brings him closer to his goal... while every mistake could drag him into despair.
An epic progression isekai fantasy about survival, power, and the challenge of facing the [Undead King].