The anime is based on a manga by the same name that is running in the "Manga Erotics F" magazine, a magazine aimed at both women and men. It is currently ongoing, since 2004. The series has also been bound in book volumes, beginning in December 2005, with 4 volumes so far.
The series takes place in Kamakura, Japan.
In Episode 8, you can see a Poster at the Movie Theater for Disney/Pixar's Wall-E in the Background's signature Water Color Style.