Plot

A teenager gets involved with a group of sorcerers from World War 2 who unleashed a force beyond their understanding.

At the end of World War II, sorcerers use the lives lost in battle as a ritual sacrifice in an attempt to resurrect a group of supermen whose coming would signify the world's end. Yet when the war finally ends, no one knows whether the ritual was a success. Decades pass, and it's all forgotten until present-day Japan when Ren Fuji has a disturbing dream of black-clothed knights.—Funimation

The Longinus Dreizehn Orden has resurfaced in present-day Japan and, by sacrificing the souls of millions, seeks ultimate power. However, high school student Ren Fuji is poised to stop them. Armed with brutally efficient abilities similar to the LDO, and possessing an indomitable will to rescue his friends, he'll risk life and limb to save as many people as he can from a fate worse than death. If Ren wants to get to their leader, Lord Heydrich, killing lesser members on the hierarchical ladder is his best and only option.—Amazon

At the end of World War II, sorcerers use the lives lost in battle as a ritual sacrifice to resurrect a group of supermen whose coming would signify the world's end. All is forgotten until present-day Japan when Ren Fuji has a disturbing dream.—Amazon Prime Video

Ren Fujii is a normal student who just had a fistfight with his former best friend, leading him to break off their friendship. But with the help of his childhood friend, Kasumi Ayase, and upperclassman, Rea Himuro, he's gradually returning to his normal school life. Then a series of brutal murders in which the victims are decapitated begins to strike their city. Strangely, at the same time, Ren starts to have terrifying nightmares of being beheaded by a guillotine. But these are just a prelude to the painful and terrifying battles to come.—Crunchyroll