Taking care of his sister who became paralyzed from falling off a tree, Tatsuya Kitazaki harbors revenge. However, as he readies to chop down the tree, a peculiar girl named Sara Nishikujo shows up and intervenes. Remarkably, Sara possesses the gift of conversing with plants, and she narrates to Tatsuya the tree's perspective of his sister's mishap. This event serves as a turning point for Tatsuya since it transforms his life's trajectory.