Katsuhiko Tobe faces an odd dilemma. Losing control of his physical self, his body diffuses into nothingness as his disembodied consciousness flows throughout the world constantly contemplating both the world and his current situation. Meanwhile, his best friend Azami Seshimo waits in their native Japan for Katsuhiko's return.

In the Miyori no Mori series:

1 - Miyori no Mori
A young girl abandoned by her parents explores the wooded hillside behind her grandmother's home, encountering the various spirits of the forest in a journey of the heart.

2 - Miyori no Mori no Shiki

3 - Zoku Miyori no Mori no Shiki

From Kotonoha:

Seventh grader Hayashi Renei is troubled by a strange dream: Her dead brother, who was killed in an automobile accident, comes back to life as Coo. The dream comes again the following night and then every night thereafter.

Coo's world is a cruel one--crueler than the real world, even--with its own share of pain, suffering, and sadness. Renei is searching for her house with her brother and others whom she meets in Coo's world so that she can return to reality and the land of the living...