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When the System arrived, everyone received a class.
    Kai Chen received an error.
    Quests ignored him. Scans passed through him. Monsters noticed him anyway.
    In the first hours of the apocalypse, soldiers became Iron Guardians, students became spellblades, and office workers were sorted into parties, quests, and survival roles.
    Kai got none of it.
    No class. No map. No rewards. Not even a proper failure message.
    To the System, he was not weak. He was not low-level. He was a blank space.
    Then Kai killed his first monster and found something inside its core that did not behave like mana.
    It answered his breath.
    Now shelters are forming around levels, contribution scores, and System-approved heroes. Kai has no status, no public credit, and no reason for anyone in power to trust him.
    But beneath the error, a different path is opening.
    Qi. Meridians. Blood. Pain.
    And a kind of strength the System was never built to measure.
    The System gave humanity rules.
    Kai may be the thing outside them.