Seraph of the End: Vampire Shahar

The story is set before the main story's 'Battle in Nagoya' arc.The Shinoa Squad receives another mission from Guren; to rescue a human girl named Riko from a mysterious vampire, Shahar, and bring her back to her family. However, Ferid and Crowley also appear when they find Shahar. Can Yuuichirou save the girl?(Source: Crunchyroll)