Bobby, whose real name is 17‑year‑old Akihiko Nomura, is a high‑school dropout who lives for motorcycles. His grades are slipping, and his father—stiff, traditional but eventually acquiescent enough to let him own a bike—is doing everything he can to push Akihiko toward college. His mother is almost invisible, barely speaking a word. The only person who truly supports him is his tiny sister, nosy but always cheering him from the sidelines.
Akihiko spends every spare moment on his motorcycle: cleaning it, tuning its engine, riding it across the countryside. He is a true motorbike enthusiast. The latest milestone in his hobby was having photographs of him on a road trip printed in a popular motorcycle magazine. A girl the same age, who happened upon that issue, wrote him an exuberant, romantic letter. Akihiko confides in his sister that he had never received a letter from a girl before, and he replies, "I got your letter. I"m happy because it was from a girl."
He is not a well‑balanced teenager; he speaks very little even to his own family, and the letters he writes back are usually just one sentence. His passion consumes him so completely that he drops out of school to work at a biker bar. His father, at a loss for what else to do, forces him out of the house. Akihiko stays with a friend and is thrilled when his pen pal says she will call him. One day, the bar owner takes him to a motocross track, but that outing ends in an unexpected turn of events.