I'm a Heretic in the Apocalypse

A century after the sky split open, source matter rewrote the world. Some implanted Resonance Cores to harness the power of technology; others awakened their genes and gained control over source matter. And Lu Yan, who died in the ruins and came back to life, became the most feared Contract Spirit User. Called a heretic? No matter. He worked 27 part-time jobs and kindled a light in the long night alongside a group of companions the world had also cast aside.

"Don't call me a heretic. I'm Lu Yan. Yan, as in 'evolve.'"