When monsters first emerged, humanity was nearly wiped out. Civilization collapsed until a small group awakened mana, a mysterious energy that turned ordinary people into humanity's only hope. Among them was a legendary scientist who not only helped harness mana but rebuilt the world with technology. He created the Mana System, introduced combat training for all, and used AI to restore civilization. Statues were built in his honor and stand in every major city. Today, survival depends on one thing MANA and Rank is everything. From the age of five, every child is tested. Those with magic are given a Mana Watch, a device that tracks their energy levels and determines their Rank the number that defines their power, potential, and place in society. The higher the Rank, the greater the privileges. Those without? They're taught to survive-with weapons, tactics, and sheer willpower. Rank 2 and above are trained to explore dungeons, defend cities, or study relics. Some rise in rank and others don't survive for long The world depends on dungeon conquest, magic, and technology. Dungeons are unstable zones filled with monsters, ancient tech, and powerful artifacts. If not cleared, they collapse and unleash horrors on nearby cities. But what happens when an ordinary person inherits a relic that defies all known systems one not made for humans, nor meant for this age?