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Kai Tsutsumi (voiced by Nao Tōyama), on the surface, appears to be an ordinary second-year university student. However, she has inherited the ability to see yokai (supernatural creatures) from her grandfather. After her grandfather's passing, Kai is suddenly summoned to a lodge called "Tenjinya," located in a hidden world inhabited by yokai. It turns out that her grandfather had signed up for a massive debt, and as a result, he had no choice but to use Kai as collateral to pay it off. He agreed to marry Kai off to the owner of Tenjinya (voiced by Katsuji Mori). However, Kai refuses to go against her will, so she decides to stay at Tenjinya and work to pay off the debt. She is surrounded by a group of yokai, including the perfectionist Ginji (voiced by Sui Ishikawa), the impulsive and rough but hardworking Asagi (voiced by Yūma Inada), and the cold but warm-hearted Yuki Onna (voiced by Aya Kamiki). With these yokai by her side, Kai's daily life begins.