A “Spirit Master” borrows the power of contracted spirits to fight against evil that threatens people. Roque Alreas, a second-year student at the Utrea Academy, a training institution for Spirit Masters, possesses the strength to be second in his class but has never summoned a contracted spirit even once. As a result, he has garnered attention and high evaluations throughout the academy, with people believing he is “hiding his true power.”

However, as for Roque himself— “Why don’t I summon a contracted spirit? Because I don’t have one!” His strength comes from tirelessly honing his swordsmanship and martial arts, utilizing only the tiny spirit that he can barely contract. In reality, he’s always fighting desperately just to survive…!?