Imagine logging into the ultimate VRMMORPG only to find yourself on the wrong side of the screen… permanently. That's the terrifying reality for Kai Grimer in *Summoner Online: I Became the Tutorial Boss with a 999+ Villainess*. Instead of exploring a vast world of adventure, he’s trapped as the tutorial dungeon’s final boss, an NPC destined for endless slaughter. Escape seems impossible: the logout button is useless, and death means final deletion. Desperate, Kai activates a last-ditch skill: [Grand Summon]. He hopes for a helpful ally, but instead pulls Lyra, the Abyssal Empress, a being of unimaginable power and apocalyptic danger. Bound by the summoning contract to obey Kai, her terrifying strength is now at his command. But her obedience quickly spirals into a possessive obsession. Kai, no longer a victim, begins to fight back. Each defeated player grants him experience, each new summon bolsters his growing army of knights, demons, and other powerful entities. But Lyra isn't the only world-ending beauty vying for his attention, and the game itself begins to buckle under the weight of his existence. Hunted by guilds, desired by dangerous women, and trapped in a broken system, Kai is determined not just to survive *Summoner Online*, but to dominate it. Will he conquer the game, or will the game—and his overpowered, possessive summons—consume him first?