This is a story about a piano, pitifully abandoned in the woods, and a young boy, Kai, who grew up playing it as his favorite toy. While Kai cannot even read sheet music, one day, he meets Shuhei Amamiya, an aspiring child pianist who transfers schools from Tokyo, and their music teacher, Sosuke Ajino. Ajino was also once a gifted pianist, until a tragic accident stole his promising future from him forever. Each from a different background, the trio’s personalities gravitate to one another and rebound. All the while, the piano sits patiently, awaiting a hand to play it.
Now sixteen, Kai has met a woman he can truly say he loves. Unsurprisingly, it was the piano that brought them together. Though still young and naive, Kai's feelings take root deep in his heart, enduring all that would tear the two apart. In the wake of the storm, Kai has but one wish ... to play for her on the piano in the forest.