Hotarubi no Mori e

Synopsis

Several oneshots:

1) *Overhearing a Flower Song*
(Spring story) "During these past few days I've been on [cleaning] duty, there's been the sound of a guitar coming from that old school building that we've been barred entry..."

2) *Into the Forest of Fireflies' Light (Hotaru no Mori E)*
(Summer story) "I met him when I was six years old. On a scorching hot Summer day, in a forest that legend says is home to many spirits and monsters..."

3) *The Fallling of Autumn Leaves*
(Autumn story) "To me, back then, it was in order to stay by my beloved Kaede... that I came up with the most brilliant plan."

4) *Deepening the Scar*
(Winter story) About a sister and brother who reunite because their family decides to get together again after 8 years. But things will never be the same as they were in their innocent days...

The reprint contains the identical title story as chapter 1 (Hotarubi no Mori e), and three additional new stories:

2) Taion no Kakera
3) Hoshi no Mienai
4) Hotarubi no Mori e - Special Chapter

Synopsis & details from MangaUpdates