Shuichi Hirakawa is a thin boy with social disorder.
His father is an ordinary bicycle repairman.
Shuichi has been exposed to all kinds of bicycles since he was a child, which made Xiuyi have a deep interest and emotion in them, and he fell madly in love with road bicycle racing.
Suddenly one day, several unscrupulous youths broke into his father's shop. They claimed that they had repaired bicycles in his father's repair shop, and they lost the competition due to maintenance errors. They demanded high compensation from the store manager and smashed all the bicycles in the shop into scrap metal.
The dispute quickly turned into a brawl. Unfortunately, Shuichi was severely hit on the head by a flying object and was immediately sent to the hospital for treatment.
However, while everyone was pacing around outside the emergency room, the boy lying on the operating table had already gone to another time and space...