Brother, Dear Brother - 01-05 torrent

Plot: Nanako and her childhood friend Tomoko enter a special all-girl high school where students are rich upper class. The series is about events that take place during her schooldays, which she chronicles in letters she sends to her brother.

A classic anime written by Riyoko Ikeda.

*Beware* This anime contains Shoujo-Ai, so it might not be suited for everyone.