Despite incurring a hefty debt to the somber Haruitsuki Abeno, Hanae Ashiya finds solace in his role as an exorcist. With a unique ability to converse with youkai, he embraces the duty of guiding these mystical beings back to the Underworld. Just as Ashiya settles into his newfound purpose, his harmonious routine is disrupted by the growing awareness of his presence among youkai. As tensions rise and suspicions surface about a human aiding the Mononokean, an otherworldly tearoom, Ashiya's peaceful existence is once more at risk. A fateful journey to the Underworld unravels a chain of events, revealing dissent among the youkai and challenging Abeno's endeavors.