NieA_7 (ニアアンダーセブン), also known as NieA under 7, is a 13 episode anime series about Mayuko, a poor, introverted student who lives above a Japanese bathhouse, and NieA, a freeloading, freewheeling alien who lives in her closet and eats her food. The series begins on a light comedic tone (most of the early episodes are about schemes to rejuvenate the bathhouse), and deepens somewhat as it explores the evolving relationship between Mayuko and NieA, but the overall ending is upbeat. The series touches lightly upon issues of discrimination, stereotypes, alienation and assimilation. Mayuko, who attends a cram school, is prone to melancholy and suffers from anomie. NieA, who is apparently placed in an inferior class by her fellow aliens, immediately accuses anyone who calls her a 'stupid no-antenna' or the like of discrimination. Another alien adopts stereotypical Indian dress and opens a convenience store. This theme of the comic alien is carried through in the brief live-action sequence which ends each episode, "Dalgit's Tidbit of Indian Information." which is in a foreign language and must be subtitled if you want to read it.

NieA_7 is based on a doujinshi by graphic designer Yoshitoshi ABe and published by Kadokawa Shoten. Much of NieA_7's staff was made up of people who had worked on Serial Experiments Lain (director Takuya Sato was the storyboard artist for Lain, Yoshitoshi ABe was the character designer for Lain, etc.); it is commonly supposed that they chose to do this light-hearted series to cool off after the dark and psychologically intense Serial Experiments Lain. This idea is further supported by the character Chiaki, a UFO fanatic who shares a name with Chiaki J. Konaka, the script writer for Lain.

From Wikipedia