The Morose Mononokean (2016)
Original title: 不機嫌なモノノケ庵
The Morose Mononokean is a 2016 Japanese-language animation series. It stars Tomoaki Maeno, Yuki Kaji and Ayahi Takagaki.
Ashiya 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.
Where to watch The Morose Mononokean
Stream: Crunchyroll, Crunchyroll Amazon Channel