NieA_7: Series (2000)

A country girl, aliens and UFOs - what could go wrong? Mayuko Chigasaki is an ordinary girl from the countryside, who now is attending university in big city Tokyo. She struggles each day to make ends meet while studying for her exams, barely scraping up the yen to afford bus fare to and from school. And at the end of the day, she comes home to a gluttonous, freeloading alien living in her closet! Ever since the aliens landed, things have been justa little weirder in Japan. Despite that, life goes on as normal for these outsiders. At least, as normal as things can be when your alien roommate builds UFOs out of junk and generally acts like none of her actions have consequences. Each day brings something new!