Ashiya has spent his 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 the Mononokean guiding mononoke that happened to wander into this world go to the next world.

The following links are to AnimeNewsNetwork for the anime:
[url=https://www.animenewsnetwork.com/encyclopedia/anime.php?id=18061]Season 1[/url]
[url=https://www.animenewsnetwork.com/encyclopedia/anime.php?id=21128]Season 2[/url]