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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
종말의 세라프 - 이치노세 구렌, 16세의 파멸
Owari no Seraph: Ichinose Guren, Sự diệt vong năm 16 tuổi
Seraph of the end: Guren Ichinose, catástrofe a los 16
Seraph of the End – Serafin dni ostatnich
Последний Серафим: Катастрофа шестнадцатилетнего Глена Ичиносе
終結的熾天使

Adaptation

novel
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)