Piano no Mori: The Perfect World of Kai(ピアノの森 -The perfect world of KAI-, lit. "Piano Forest") is an ongoing manga by Makoto Isshiki, about Shuhei Amamiya, who transfers to Moriwaki Elementary filled with hope and ambition about his new life. But it doesn't take long before he gets picked on by the class bullies, and gets involved in a dare to play the mysterious piano in the forest, leading to his meeting an enigmatic child that goes by the name of Kai Ichinose, who seems to be the only one capable getting sound out of the thought to be broken piano. His ability earns him the respect of Shuhei and his music teacher, former master pianist Sosuke Ajino. At first Kai is resistant to refining his art but after hearing Sosuke play a Chopin piece he just can't seem to play by himself, he relent