Shingeki no Bahamut: Genesis – Short Story (Sub)
Watch Shingeki no Bahamut: Genesis – Short Story full episodes online enghlish sub
Synopsis: The first short story focuses on Favaro and Kaiser between the events of the first and second series as they visit Favaro’s home village.
The second short story shows Kaiser as a knight commander sparring with Jeanne, and sharing the reasons they remained as Orleans Knights in the aftermath of the final battle against Bahamut.
More info: Myanimelist, wikipedia