Rui Kamishiro—an extremely competent mechanic who sees to absolutely dominate the industry with his skilled hands, genius thinking and quick wit. He works for a small, busted and broken-down repair shop now, but he’s quickly earned the reputation of a renowned and incredible engineer and mechanic. He has been assigned an assistant to help him, and it’s their first job together in the middle of the summer, heat of the day with an extremely annoying customer.