Little time has passed since the Magic Knights’ final confrontation with Princess Emeraude’s Mashin. Still haunted by the princess’ death, Hikaru Shidou returns to Tokyo Tower. There, she meets her friends Umi Ryuuzaki and Fuu Hououji for the first time since their spontaneous quest to save Cephiro. Plagued by nightmares of the realm she had left behind, Hikaru is relieved to find that her companions too want to return and serve the kingdom they once so dutifully protected. The Magic Knights’ wish is answered, for at the top of Tokyo Tower, the three are blinded by the same great light they had seen on the day they first met. Once more on the back of a flying fish, the group returns to Cephiro—a world now desolate and in ruins. With the collapse of the Pillar's power, monsters freely roam the land while three nations seek to annex Cephiro with hopes of seizing the Pillar for themselves. Complicating things further is the mysterious Lady Debonair, who proclaims herself to be the rightful heir of the fallen country. Now confronting graver stakes and radically different enemies, the three Magic Knights set forth once more to save Cephiro and bring peace. With the bonds they have forged together, the trio stands united in the face of such a great challenge.

In a society of people with animal characteristics, Belle Lablac stands out as the only person with no animal features at all. Curious of her origins, Belle leaves her hometown and heads to the city of Schubertland to be awarded the status of Nomad by Schubertland's ruler, King Rawhide. Through the journey, she is trained by the legendary swordsman Sian Lablac. Unfortunately for Belle, through a complication, she is unable to hurt others with her legendary sword Runding. The only choice to best her opponents in battle now is to break their swords, which is heavily looked down upon. Though ostracized for her appearance and hated for her disregard of societal norms, Belle stays resolute as she sets off on a perilous journey to find her rightful place in the world.

Mini specials bundled with each Blu-ray/DVD volume of Seireitsukai no Blade Dance. Each special is tied to the new 32-page short story that original light novel author Shimizu Yuu wrote for the limited first pressing of every Blu-ray/DVD volume.

Legend says that centuries ago, a colossal spider ravaged Tokyo. Resistance was futile, as none could quell the havoc wrought upon the city by the beast. Fortunately, one man—the legendary exorcist—stopped the devastation. Using his divine powers, he sealed the monster away and the world has enjoyed peace ever since. Mizuki Henmi is an adolescent girl who is acquainted with Shu Suzuri, a dull young man who runs an old Japanese bookstore. During a routine visit to his store, Mizuki learns of a mysterious and valuable book that Shu is planning to sell. Unfortunately, the unrestrained Mizuki handles the book roughly, breaking the seal that kept it shut and revealing an odd entity—a cute spider. Wasurenagumo tells the story of Mizuki, Shu, and their seemingly harmless spider. However, ominous winds begin blowing. While Shu is infatuated with his arachnid friend, Mizuki becomes wary of its every move…