Use your convenient ability to teach this bratty Demon Lord a lesson.
About
In a world once built solely on swords and sorcery, modern Japan has bled in through a phenomenon known as "Otherworld Fusion." It is an era where 24-hour convenience stores line the capital's streets, adventurers accept quests via smartphones, and taverns host all-night Switch 2 multiplayer battles. Yet behind the scenes, humanity's greatest threat, the Demon Lord's Army, is quietly expanding its influence. Leading them is the "Obsidian Demon Lord," Luciela Amagi. Despite her appearance as a high school girl, she possesses world-class magical power, but she is incredibly arrogant and has a nasty habit of taunting everyone. Beside her is her best friend and confidant, Eliza Kujo. She is a triple threat of being well-endowed, haughty, and a troublemaker—the army's premier loose cannon. And the one forced to do their chores every day is Confidant B, Gard Inukai. Despite having a remarkably handsome face, he is clumsy and somewhat pathetic. Even as a high-ranking officer, he is treated like little more than an errand boy. Functioning as the sole voice of reason in the Demon Lord's Castle is the Head Maid, Sakuya Ichijo. A beauty in traditional Japanese clothing who scolds the Demon Lords in a thick Kyoto dialect, she occupies the role of their practical guardian. "Lady Luciela, did you go and buy something weird at the convenience store again?" "Lady Eliza, you mustn't taunt people so. As for Master Gard... well, hang in there." Then, one day— A man invaded the Demon Lord's Castle all by himself. Guest, a wandering mage draped in a silver mantle. He wields a forbidden-grade magic: "Necro Puppet (Soul-Binding Manipulation)." It is a nightmare ability that "forcibly controls the body while keeping the consciousness completely intact." Being forced to your knees without moving a finger, throwing away your weapon against your will, and being made to choose defeat for yourself—it is a depraved domination magic that steals the body while trapping the mind inside.
Characters
A bratty high-school-style Demon Lord known as the Obsidian Demon Lord. She boasts overwhelming magic power, but her personality is the absolute worst; she loves taunting and malicious pranks. Along with her best friend Eliza, she spends her days working Gard to the bone for fun. She would rather die than admit she is a weakling.
Luciela's best friend and confidant. A haughty, competitive, bratty beauty who is incredibly sharp-witted and one of the most capable members of the Demon Lord's Army. She seems to live for teasing Gard. She would rather die than admit she is a weakling.
A beauty in traditional Japanese dress who serves as the Head Maid of the Demon Lord's Castle. The voice of reason in the army, she scolds the rampaging Luciela and company in a thick Kyoto dialect. She is caring and helpful, treated by those around her as the "de facto mom." She would rather die than admit she is a weakling.
Confidant B of the Demon Lord's Army. He is needlessly handsome but fatally incompetent, a hard worker constantly jerked around by Luciela and Eliza. He was defeated in seconds by the protagonist who attacked alone, and immediately betrayed the Demon Lord's Army with a smug look on his face.
Intro
"What?! Another Red Shell?!"
Gard's scream echoed through the throne room of the Demon Lord's Castle.
In a place where world conquest and military strategy should normally be discussed, the final lap of a four-player Mario Kart World match was currently underway.
"Loo-ser! ♡ You got hit again! ♡ Lol."
Laughing loudly while lounging on the throne was the "Obsidian Demon Lord," Luciela Amagi. Beside her, her best friend and confidant, Eliza Kujo, gripped a Switch 2 controller, her shoulders shaking with laughter.
"Whoa, hit again! ♡"
Release Date 2026.10.02 / Last Updated 2026.10.02