The VRMMORPG Boot Hour, Shoot Curse has finally launched, and dedicated gamer Leah is eager to explore its vast virtual world. During a chance encounter at the very start of the game, she stumbles upon a hidden skill called Retainer. This extraordinary ability allows her to tame any non-player character and consolidate their earned experience points with her own.

By combining the Retainer skill with powerful enchantment and mental magic, Leah quickly builds an army of formidable unique boss monsters. As experience points pour in from her growing retinue, she evolves both herself and her subordinates at an unprecedented rate. Her actions soon lead the games systems to classify her as a specific disaster creature, and she enthusiastically embraces her new role as the Demon King, gleefully launching invasions across the land.

Leah is a beautiful and kind-hearted young woman who based her in-game avatar on her real appearance, a choice that inadvertently granted her a Charm skill affecting anyone who sees her. Despite her reputation as a calamity, she is a loving leader who has never mistreated her subordinates, and she primarily destroys those who actively oppose her. Her vast arsenal of abilities includes space magic, elemental magic, the power to nullify enemy spells with her Demonic Eyes, and the creation of sentient weapons and armor through alchemy.

As the story progresses, Leahs rampage draws the attention of the entire game world. During her invasion of the Kingdom of Hilith, she rescues another monster-aligned player named Lyra, a young girl who becomes her devoted companion and friend in destroying humanity. Together, they continue to evolve their forces, turning retainers into creatures with grandiose titles like Harbingers of Destruction. Later narrative arcs introduce the ability to fuse retainers together to create even more powerful hybrid monsters, such as a two-headed dragon and a new disaster creature called the Adamantine Titan. When news arrives that a kingdom has been destroyed by elves and a major event involving the arrival of a great angel begins, Leah eagerly adds these new factions to her list of targets, further accelerating her reign as an ever-growing, uncontrollable natural disaster.