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