Sleepy Child: Dream Another Dream Manga collects the first three stories from Shinnosuke Saika’s Sleepy Child works: Sleepy Child, That Child, and The Lullaby.

Sleepy Child 
The mysterious and fragile contours of family. A young child descends into an unusual slumber.

That Child
The slumbering child dreams again... The continuation of Saika’s Sleepy Child, this episode follows Mato’s mysterious encounter at a new school...

The Lullaby
The sound of a violin ringing out over the banks of the river Styx... The continuation of Saika’s “Sleepy Child”, this episode follows Rika, one of Mato’s classmates from school, while she waits for her mother’s return...