Salaryman Kuroto Nakano leads a tiring and stressful life with long hours. When he finishes work he returns to an empty apartment. Then one day when he gets home he is greeted by what appears to be a young girl... with fox ears and a tail! She explains that she is actually and eight hundred year old demigod and she has come from the spirit world to help relieve his stress. She cooks for him, tidies his apartment and even lets him fluff her tail... something she finds mildly embarrassing. Strangely Kuroto has a feeling that he has met Senko before but can't remember when. Over the course of the series Senko meets Kuroro's neighbour, Yasuko Koenji, an aspiring manga artist who assumes Senko is a cosplayer. They are also regularly visited by Shiro, another fox spirit Senko's age and occasionally by the much older, and rather seductive Yozora.
This is one of those series where not much happens but leave you with a warm feeling inside. You don't need a stressful life like Kuroto to sympathise with his initial situation and understand why Senko makes him happy. Senko is an utterly adorable character and it is refreshing that there is nothing sexual about her relationship with Kuroto... his desire to stroke her tail is because it is soft and fluffy. There aren't too many characters and all of the main ones are likeable and fun to watch. The animation is good and the characters have distinctive; the fox demigods are particularly cute. Overall I'd definitely recommend this to anybody wanting a feel good anime series.
These comments are based on watching the series in Japanese with English subtitles.