Mysterious City: Entering the Otherworld Through a Door

A diary recording the appearance of a mysterious world, inspiring longing in all who read it.

A door that lets you travel between two worlds, from the surface to the depths.

Cat-faced demonesses who speak like humans, wicked and cunning witches, terrifying lands of the dead, migrating descendants of ancient gods, evil spirit knights roaming through the fog, and skull birds that blot out the sky...

Once the mystery is unveiled, perhaps it should no longer be called a mystery. Perhaps it should be called horror...

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.