Three special episodes set in the Cluster Edge world, released alongside the ninth DVD volume of the TV series. The first episode follows the formation of Chalce and Chrome's tight-knit group, revealing the circumstances that brought the three youngest members into their fold. The second looks back at Chalce's transfer to Cluster E.A, his meeting with Hema, and how he came to earn the hatred of the competitive Vesuvia. The final installment introduces a strange girl who turns up at Cluster E.A looking for Fon. Whether she has come simply to visit or for some other reason is unclear, and she may find the answer she seeks among Fon and his friends. Fans get action, fantasy and sci-fi alongside backstory for the cast.