Myself; Yourself
Myself; Yourself is an anime series based off a visual novel, which is playable on the PlayStation 2. It is slated for release in December of 2007. The anime began airing in Japan in October 2007 and is supposed to consist of 13 episodes.
The story takes place in a small rural town bordering the Pacific Ocean. At the age of eleven, Sana Hidaka was forced to leave his childhood friends when his parents moved. Five years later he returns to live on his own in an apartment building that his cousin Aoi's family runs. When Sana tries to pick up from where he left, the boy soon learns that he must adapt to changes that weren't expected.
Why is she soooo mad at him?
You'll have to watch the series to find out!