They're everywhere.
Curses, Summons, you name it. We don't know where they come from, or what their initial plans are… but they have to be exorcised.
Incident of 1995, a high school in Kyoto Japan was involved in a massacre. Those students and staff were attacked by curses, and they "too" became what they were killed by.
This started the elite safety commission of curse hunters, who exorcise curses before they can strike again.
One hunter in particular who remains a mystery, is named "Kazu Hidemi."
Unlike other hunters, Kazu uses "traditional" methods to exorcise curses, and is one of the only hunters in the world to still use it.
If you ever encounter a curse or a summon… RUN. Don't look back, and make zero contact with it. Stay safe out there… E.S.C. signing off-