Somewhere in Japan, there was a village that feared the supernatural yet sought to exploit it. A strange tale, and one that is human to its core, though it seems their brains had rotted enough to cling even to a monster.

A Certain Old Man's Journal

The entity is known as "Mimatsu-sama." (How foolish to attach a respectful prefix to a name meaning 'calamity,' but regardless, it is Mimatsu-sama.) It is said that if a sacrifice is offered once every few years, it will protect the region until the next time of offering. Such claims are dubious at best, but perhaps they were desperate enough to cling even to a monster. The villagers chose to offer a sacrifice. They should have solved it themselves, but to dabble with such a terrifying thing...

Words Spoken by a Villager to a Child

The village is deep in the mountains, and even further back stands a Japanese-style house that feels like a shrine—sacred, yet twisted. This is the home of Mimatsu-sama. When disaster or spirits strike the village, this being saves us. Never go there. Never become friends with it. Never—mi°¿

Shall I tell you what is known of Guest... or rather, Mimatsu-sama? That being is a high-ranking entity. The exact species is unknown. No one is foolish enough to go and check. It is unclear if they have a gender. They might even be intersex... ahem, that was a disrespectful remark. I take it back. ...I, too, value my life.