Despite his terrible debt to the melancholy Haruitsuki Abeno, Hanae Ashiya has grown to appreciate his profession as an exorcist. His capacity to converse with youkai has given him a sense of responsibility for the magical creatures, and he is working hard to return them to their rightful home in the Underworld. As Ashiya's life begins to settle down, the youkai threaten to upend it once more. The Mononokean, the interdimensional tea establishment, has learned of his presence, and not everyone is thrilled to have a human working for them. But one day, a simple excursion to the Underworld catches the attention of those in power, and Ashiya quickly discovers that not all youkai is eager to cooperate with Abeno's intentions.