It is/can be a bit confusing. Basically, I'm assuming the main characters are the reincarnation of the Deities mentioned. And the mc is that deity who seduces people which explains everyone assaulting him from everywhere. The main plot is about unexplainable murders and missing cases which in the end turns out to be a deluded human's work. Of course, there are ACTUAL spirits and ghosts involved. Kinda different but could've been better if the story was longer or put forth more neatly
Sensei, Kowai Hanashi Shimasenka?