Reincarnated Onmyoji (Light Novel), Vol. 1

"You'll stay with me forever, won't you, Master?"
Kamo Kazuki was sent to Hell by mistake. Now reborn into a world overrun by supernatural creatures, he is tasked with performing purification rituals to cleanse his soul of lingering corruption.
Unfortunately, that lingering "impurity" makes him irresistible to yokai.
Before he knows it, Kazuki is surrounded by an eccentric entourage: an overly devoted mountain spirit, a flirtatious tengu descendant, and a seductive spider demon who insists on becoming his lover. Drawn in by the overwhelming divine power he received from the King of Hell, only the strongest and strangest spirits gather around him.
Though constantly bewildered by their intense affection, Kazuki finds their presence oddly convenient. If he must purify souls to redeem himself, then exorcising powerful monsters is the fastest way forward.
As he subjugates one high-level apparition after another, his name quickly spreads. But such abnormal strength does not go unnoticed. Soon, even the Onmyoji Association begins to take an interest in him...
With a band of troublesome yet loyal yokai at his side, Kazuki effortlessly seals away monstrous threats and supernatural horrors alike.
A former onmyoji rises again from Hell to run an unstoppable supernatural odd-jobs business in this action-packed fantasy of purification, power, and eccentric companions.