Sweet blue flowers. Vol. 2 - Takako Shimura

Akira Okudaira is starting high school and is ready for exciting new experiences. And on the first day of school, she runs into her best friend from kindergarten at the train station! Now Akira and Fumi have the chance to rekindle their friendship, but life has gotten a lot more complicated since they were kids.

Kyoko's fianc invites a group of her friends to join them at his family's summer home. But the trip ends up including more than just ghost stories and horseback riding - Fumi can now confirm that she has feelings for Akira. And Akira learns more than she wants to about Kyoko's private life with some accidental eavesdropping. After this, how can the girls just return to school like nothing's happened?

The best-known and most highly regarded series in the yuri genre.