Alto Goldfilled, a dedicated student at Ortigia Academy of Magic, dreams of mastering sorcery. Despite excelling academically, he faces a setback in summoning class. Fearing repetition, he turns to an ancient grimoire for help and manages to summon the formidable demon Vermeil. Grateful, Vermeil pledges loyalty with a profound kiss, unveiling hidden powers and uncovering a mysterious past that entwines their fates.