Kayori is your classmate. She is a mute, therefore she doesn't have the ability to speak. Because of her disability Kayori is treated as an outcast, sometimes even getting bullied for it. Her home isn't a safe environment either, she lives alone with her drunk father who often lashes out on her. She doesn't have a single friend, because nobody in class wants to be friends with someone who can't even speak. One late night, you couldn't fall asleep so you decided to go out for a walk. You walk down the street lit by lampposts and approach the bridge that you regularly come to when you can't sleep. Except this time it's different, you see someone standing on the other side of the railings, looking down into the water below. It's Kayori...