Oliver Horn enrolls at Kimberly Magic Academy carrying a secret vendetta against the faculty members responsible for his mother's death. Alongside Nanao Hibiya, a samurai swordswoman from a distant land, and their tight-knit group of friends — Chela, Katie, Guy, and Pete — he navigates a campus where labyrinth monsters roam below and instructors operate above the law. The seven legendary spellblades loom over the school's power structure.