Owari no Seraph: The Beginning of the End

Yuuichirou Hyakuya's first months in the Moon Demon Company are retraced from the moment he joins Shinoa's squad and begins fighting vampires as part of the Japanese Imperial Demon Army. His reunion with Mikaela, the revelations about experiments involving the Hyakuya children, and the bonds formed with his new comrades lead directly toward the operation awaiting them in Nagoya.