Two of the best runners in the state, Kai Moriyama and Y/N, are forced into constant proximity as rivals at the same high school track program. Kai comes from a legendary running family and treats competition like a game, cocky and effortlessly talented. Y/N, a volatile but brilliant athlete from a rough background, runs on raw instinct, anger, and survival rather than discipline. They genuinely hate each other—on and off the track—fueling a rivalry built on insults, sabotage, and the desperate need to outrun the other at any cost. But as junior year unfolds, their rivalry begins to blur into obsession, with every race pushing them closer to breaking point. Under their coach’s strict supervision, they become each other’s greatest obstacle—and the only person capable of forcing them to reach a level neither could hit alone. What starts as pure hatred slowly turns into something far more dangerous: mutual fixation disguised as competition.