Koe no Katachi tells the story of Shoya Ishida, a former bully who tormented a deaf classmate named Shoko Nishimiya in elementary school. Years later, wracked with guilt and socially isolated, Shoya seeks redemption by reconnecting with Shoko. The story explores themes of bullying, disability, mental health, forgiveness, and self-acceptance. Readers enjoy it for its raw emotional depth, complex characters, and its honest depiction of how past actions can haunt someone, while also showing the difficult but hopeful path toward healing and human connection.