SK8 the Infinity

Reki has been racing in S — an illegal night skateboarding tournament held inside an abandoned Okinawan mine — for as long as he can keep his parents from finding out. The series opens on his attempt to drag a transfer student named Langa down the mountain for fun. Langa, who has never been on a skateboard but has spent his life snowboarding the slopes of Canada, takes one run and discovers he is preternaturally good. The series is Reki and Langa's friendship and rivalry, the regulars of S who decide they want a piece of Langa, and the price S keeps quietly extracting from its winners.