Fukigen na Mononokean(4956)

Other Title(s)The Morose Mononokean
Genre(s)Comedy, Shounen, Supernatural
SynopsisAshiya has spent the first seven days of high school stuck in the infirmary because of a youkai attaching itself to him. He ends up asking the owner of a small tea room called the 'Mononokean' for help. This is a tale involving the very morose owner of Mononokean guiding the youkai that happened to wander into this world go to the next world.

(Source: Crunchyroll)