When 10-year-old Kaneda Shota was involved in a car accident that claimed the life of his father, it changed the course of his life forever. Even though his mother got a job and tried her best to her son, money was always tight. Now, unable to afford college, Shota works a part-time job, in addition to his full-time job at his uncle's factory. He dreams of one day saving enough money to go to college. He lives alone, on the second floor of one of his uncle's warehouses, and doesn't have any friends. Everywhere he goes, he rides a bicycle, with headphones to block out the flashback-inducing sounds of the cars. 5u6x4n

His quiet way of life is about to be interrupted. Due to pressures from the economy, Shota's job at his uncle's factory is going to be cut to half-time/half-pay for a while. In addition, Shota's uncle has agreed to lend the first floor of Shota's warehouse to a college club. This club is building a solar car to enter in a race, and they're hoping to get Shota to lend them his mechanical expertise. Will Yazaki Junko and the other club be able to handle Shota's anger and bitterness, and draw him out of his self-imposed isolation?