In 2458, on the world of Blue Star, demon incursions and the universal era of Class Awakening have long since become the unshakable new normal.

Aaron hails from a notable bloodline—his elder sister is a prodigy knight, ranked among the top 100 on the Capital City Knight Leaderboard. Yet as a child, he deliberately swallowed corrosive poison to protect her, an act that left his body permanently weakened and his physical constitution shattered.

In a world where strength reigns supreme, he is universally written off at his school as a dead-weight parasite squandering public resources. Even his instructors openly urge him to drop out voluntarily and stop wasting everyone's time.

"All I need… is an answer."

Amid sneers and jeers from the entire student body, Aaron still steps onto the platform in the Awakening Hall. The crowd waits eagerly to watch this failure humiliate himself all over again.

Then it happens. A pillar of searing golden light blasts skyward, and sacred, ethereal phantoms drift forth from every side, bowing low to hail him as their king.

Aaron has awakened the one and only Hidden Legendary Class—Shade Herder.

By infusing specific materials, he can forge spirit replicas of any Professional—even demons themselves—and build a one-man army.

And far more terrifying still: he can stack every attribute and every skill from those spirits directly onto his own body.

I am legion unto myself. I am the walking calamity upon this earth. I am the legend.