Ikki Kurogane possesses the ability to manifest his soul as a weapon, making him a Blazer. However, his magical aptitude is nearly nonexistent, a stark contrast to most others with this power. Labeled the "Worst One" and written off as a talentless failure, he has dedicated himself to mastering the sword in hopes of still becoming a Mage-Knight.
Stella Vermillion, the second imperial princess of the Vermillion Empire, is a formidable Rank A Blazer whose incredible natural talent has kept her undefeated in battle throughout her life. Seeking powerful opponents to further her growth, she travels to Japan with the ambition of becoming an accomplished Mage-Knight.
Their paths cross at Hagun Academy, one of Japan's seven Mage-Knight institutions. They quickly discover a shared dream: to earn renown as powerful Mage-Knights through hard work and skill, regardless of their innate talent. To achieve this, they must first face each other in the finals of the Seven Stars Battle Festival—an intense, no-holds-barred tournament gathering the strongest student knights from all seven schools across Japan, where the victor claims the title of Seven Stars King.
Will Ikki and Stella be able to stand against even the mightiest Blazers and fulfill their aspirations of reaching the pinnacle of knighthood?