Mitsue Kiri, a once-in-200-years prodigy from an assassin clan, has arrived at the prestigious Adamas Academy, a school that gathers geniuses from around the world. This academy is a harsh place where only the strong can inherit skills, and the weak are eliminated. Kiri's sole purpose is to indulge in victory, no matter the form of competition—be it a fight, rock-paper-scissors, or even a game of marbles. He approaches every challenge with full force. In the exclusive Heavenly Palace, where only those recognized for their unparalleled talent reside, Kiri encounters Yuxia Blanche, a solitary genius girl who once defeated him. Despite her exceptional talent, she laments that no one dares to challenge her, and she loves Kiri for continuously challenging her, even after repeated defeats. Kiri's relentless pursuit of victory gradually transforms the 'winning mindset' of those around him.