Senten no Sephirot City

is a Japanese light novel series written by Haruki Hiramatsu, with illustrations by Ponkan (8). The series began publication on July 9, 2016 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
The world destroyed by "World Simultaneous Deep Greening".

The remaining amount of life left for humankind, which lives parasitic on the Tree of Life (Sephirot) that penetrates the heavens and the earth, is 72 hours.

72 hours of "dead time" -this is the remaining amount of life set for humans in a tree-layered city that lives far above the surface of the earth.

The only way to break the countdown to death, which is equally imposed on all humankind, and reset it to 72 hours-it is the "forbidden fruit" that grows on the skeleton of the Tree of Life, which is born from the Tree of Life. "To say. That was it.

Those who harvest the forbidden fruit by manipulating the device "Sin Box" that activates special skills in exchange for the rapid consumption of dead time "Sin Beast Hunt (Grim Reaper)". Kisaragi Kisaki, one of them, steps into the realm of sin beasts with his sister Yuiha and his partner Lorna. There, they met a girl with an infinite amount of life left.

It was the dawn of a terrifying conspiracy aimed at mankind's long-cherished desire, "Liberation from the 72-hour curse."