A novel adaptation of Makoto Shinkai's anime Byousoku 5 Centimeter. The story follows two individuals, Toono Takaki and Shinohara Akari, who were once close friends but gradually drift apart as time progresses. Their families cause them to become separated, though they maintain contact through letters. However, as time goes on, their communication begins to fade. Years pass, and the distance between them widens. Takaki recalls the moments they shared, but as his life unfolds, he wonders if he will ever get the chance to meet Akari again, as the narrative explores his growing awareness of the world and the people around him.