Eisner-nominated series: A plea from the future. On the day Naho starts 11th grade, she receives a letter from herself written ten years in the future. At first, she thinks it's a joke, but as the predictions in the letter come true one by one, Naho realizes that the letter might be real. Her future self tells Naho that a new exchange student, a boy named Kakeru, will soon join her class. The letter asks Naho to look out for him and states that only Naho can save Kakeru from a terrible future. Who is this mysterious boy, and can Naho protect him from his fate? The heart-wrenching sci-fi romance that has been printed over a million times in Japan.