Kakuriyo: Bed & Breakfast for Spirits, Vol. 1-10 by Waco Ioka is the first book in a series about Aoi Tsubaki, a young woman who can see spirits and is taken to the spirit world to pay her grandfather's debt. She must work at the spirit world inn, Tenjin-ya, to avoid marrying the inn's head or being eaten by demons, determined to pay off the debt herself by proving her worth as a cook. The novel, published by VIZ Media, introduces Aoi's struggle to find a place in the spirit world despite being human.