"Bladedance of Elementalers" is set in a world where powerful spirits and elemental magic shape the course of history. The narrative centers on Kamito Kazehaya, the only male elementalist in a world dominated by female practitioners. Elementalists form contracts with spirits to wield their powers, and Kamito is no exception, having contracted with a powerful spirit named Restia. However, his past is shrouded in mystery, as he was once a member of the legendary "Instructional School," a shadowy organization that trained elite assassins. After leaving the school, Kamito seeks a normal life but is drawn back into the world of elementalists when he accidentally forms a contract with a spirit named Est, who takes the form of a sword.

The story unfolds at the prestigious Areishia Spirit Academy, where young elementalists train to compete in the "Blade Dance," a sacred tournament held once every few years. The winner of the Blade Dance earns the right to form a contract with the most powerful spirit of all, the Elemental Lord. Kamito is reluctantly roped into participating in the tournament as a representative of the academy, despite being the only male participant. His presence disrupts the status quo, as male elementalists are considered a rarity and often viewed with suspicion.

Throughout the series, Kamito forms alliances with several female elementalists, each with their own motivations and backstories. Claire Rouge, a fiery and determined noble, becomes one of his closest companions, along with her contracted spirit, Scarlet. Other key characters include Ellis Fahrengart, a disciplined knight, and Rinslet Laurenfrost, a skilled ice elementalist. Together, they navigate the challenges of the Blade Dance, facing rival teams, political intrigue, and the resurgence of dark forces tied to Kamito's past.

The plot delves into themes of loyalty, identity, and the consequences of wielding power. Kamito's dual contracts with Restia and Est create tension, as Restia's true intentions remain ambiguous, and Est's origins are tied to a deeper mystery involving the Elemental Lords. The series explores the dynamics between elementalists and their spirits, as well as the moral complexities of using power for personal gain versus the greater good.

As the Blade Dance progresses, Kamito and his allies uncover a conspiracy that threatens the balance of the world. The Elemental Lords, revered as divine beings, are revealed to have their own agendas, and Kamito's role as a key player in the unfolding events becomes increasingly significant. The narrative builds toward a climactic confrontation, blending action, strategy, and emotional stakes as the characters confront their destinies and the truths hidden within the world of elementalists.