Kindaichi Saki is about to start high school when, on her way to piano lessons, she accidentally bumps into a girl her age for the first time, scraping her hand. The girl silently looks at Saki, kindly picks up the fallen sheet music, and hands her a band-aid. Saki reunites with the impressive girl as classmates and learns that her name is Oikawa Kanon and that she has hearing difficulties. Feeling a sense of disappointment towards Kanon, who keeps her distance from others due to her disability, Saki makes an effort to get closer to her. As Saki continues to reach out, Kanon's attitude gradually begins to change...