Seraph of the End: Guren Ichinose: Catastrophe at Sixteen

Owari no Seraph: Ichinose Guren, 16-sai no Catastrophe
終わりのセラフ 一瀬グレン、16歳の破滅
Seraph of the End—Guren Ichinose: Catastrophe at Sixteen (Novel)
Seraph of the End: Guren Ichinose - Catastrophe at Sixteen
Seraph of the End: Guren Ichinose: Catastrophe at Sixteen (Novel)
終わりのセラフ 一瀬グレン、16歳の破滅(小説)

Sequel

manga
2012
Publishers:
and 1 more
After trumpets of the apocalypse proclaim the fall of humanity, vampires arise from the shadows to rule the earth. Yuichiro wants just one thing—to get revenge by killing each and every vampire. Yuichiro’s dream is near-impossible, given that vampires are seven times stronger than humans, and the only way to kill them is by mastering Cursed Gear, advanced demon-possessed weaponry. Not to mention that humanity’s most elite Vampire Extermination Unit, the Moon Demon Company, wants nothing to do with Yuichiro unless he can prove he’s willing to work in a team—which is the last thing he wants! (Source: VIZ Media) Note: Includes two extra chapters.

Sequel

novel
2017
Publishers:
After the events of Seraph of the End: Catastrophe at Sixteen... Guren Ichinose has committed a grievous sin—by bringing his friends back to life, he has violated the iron-clad taboo against human resurrection, and the Seraph of the End has brought the human race to its knees. The only survivors are demons and children, and those few who remain are threatened by rampaging monsters and callous vampires rounding up human beings like cattle. Faced with overwhelming despair, the survivors band together in hopes of reviving their world. Tormented by the sin he has committed and unable to share the burden with his friends, Guren sets out on a new journey amid the ruins of the world he himself destroyed. But is he man or demon, savior or angel of death? Not even he knows for sure. (Source: Kodansha USA)

Adaptation

manga
2017
Publishers:
The apocalypse is not only near, but a certainty. Set before the event and the aftermath detailed by the hit manga, this stand-alone prequel light novel series chronicles the inexorable approach of the reign of vampires. Witness the trials of Guren Ichinose, who must hide his true strength even as he is trampled on at an academy for the insufferably privileged. (Source: Kodansha USA)