ภาคต่อของเรื่อง Owari no Seraph Yuuichirou Hyakuya is finally reunited together with his childhood friend Mikaela Hyakuya, whom he had long plausible to be dead. Upon their reunion, however, he discovers that Mikaela has been changed into a lamia. Determined to assist his friend, Yuuichirou vows to urge stronger in order that he will defend Mikaela also because the comrades within the Moon Demon Company. Kureto Hiiragi receives data that an outsized cluster of vampires are going to be gathering in urban center, making ready for his or her assault on the Imperial Demon Armys main forces in Tokyo. LED by Guren Ichinose, Yuuichirous team is one among several elite to intercept and eliminate the lamia nobles. With the urban center mission quickly approaching, the members of Shinoa squad still work towards totally mastering their weapons, whereas learning the way to improve their cooperation. Yuuichirou should gain the ability he has to dispatch the nobles and save his ally, before he succumbs to the demon of the Cursed Gear.