不機嫌なモノノケ庵 1 by Kiri Wazawa

In this captivating tale, a high school student named Hanae Ashiya finds himself entangled with the supernatural world after a mysterious yokai attaches itself to him, causing him to fall ill. Desperate for help, he stumbles upon the Mononokean, a tea room run by the enigmatic Haruitsuki Abeno, who specializes in exorcising yokai. As Hanae becomes Abeno's reluctant assistant, he embarks on a series of adventures, navigating the delicate balance between the human and spirit worlds, while uncovering the secrets of the Mononokean and the enigmatic yokai that inhabit it.