In a world where reality fractures overnight, humanity awakens to a mysterious system overlaying their existence—a game-like framework of stats, spells, and dungeons. Cities become battlefields, ordinary people wield magic, and survival depends on adapting to this new, merciless reality. Ren Ueda, a disillusioned programmer and genius coder, has spent his life in the shadows, watching others steal his work. When the system awakens, he discovers a unique class that sets him apart: Spell Coder. Unlike others bound by the rigid mechanics of the system, Ren can access and rewrite the very code of magic itself—modifying spells, breaking the limits of the game, and creating abilities the system never intended. But his newfound power comes with a cost. Each alteration destabilizes the system, attracting deadly attention—from corrupted constructs born of dungeon breaches to players willing to kill to protect their advantage. As dungeons open in Shinjuku and chaos spreads across the globe, Ren must form uneasy alliances and master his unique abilities to survive—and to uncover the truth behind the system. In a world where magic and code collide, Ren’s skills make him a powerful outlier. But the deeper he delves into the system’s secrets, the more he realizes: this isn’t just a game. It’s a war for control of reality itself.