Kuchibiru Tameiki Sakura Iro
Both volumes are a collection of seven short stories each, revolving around an all-girl's school. The first, fifth, sixth, and seventh chapter from the first volume and the first five chapters of the second volume feature the same protagonists.
This entry will reflect the Futabasha edition (published in April 2012), which has some chapters re-ordered compared to the previous (incomplete) Ichijinsha edition.
Volume 1:
1. Tomodachi ja Nakute mo (Even if We're Not Friends)
About two girls who were friends in junior high but end up going to different high schools.
2. Tengoku ni Ichiban Chikai Natsu (The Summer Closest to Heaven)
Tells the story of a ghost ...