Ikki's trump card that pushes his physical limits for one minute at the cost of immense fatigue.

The female lead. A world-class genius with massive mana reserves and fire-based abilities. She initially looks down on Ikki but gains respect for him after their duel.

To resolve the misunderstanding, the school director, , suggests a duel. Stella raises the stakes: the loser must be the winner’s "slave" for life. Despite Stella’s overwhelming fire magic, Ikki uses his superior physical technique and a forbidden skill to win, leading to an unexpected partnership as roommates. 2. Key Characters Introduced

Humans who can materialize their souls as weapons called "Devices" .

The story introduces Ikki Kurogane , an F-rank student at Hagun Academy known as the "Worst One" due to his lack of magical talent. His life changes when he returns to his dorm and accidentally walks in on Stella Vermillion , an A-rank prodigy and princess of the Vermillion Kingdom, who is half-dressed.

The core conflict highlights Ikki's hard-earned skill against Stella's natural-born genius.