The Firefly Village is an Island of Dreams

Synopsis

The Second Layer is a world where towns flourish atop the canopies of giant trees. To pass to the Third Layer, Wataru must bloom six flowers in this realm. Arriving at the firefly tribe's village, he meets a girl named Rusk and learns of Lumen, who rules the village. Rusk shows Wataru a music box that Lumen once made for her, hoping to win him back to his old self...