Sakura's Long Marathon

Sakura's class does a marathon race for Sports Day. During practice, Meiling tries to impress Shaoran by running really fast but runs out of energy. After some inspiration, she practices some more and is ready to race. The day of the event, Sakura, Shaoran, and Meiling lead the pack, but somehow they aren't seen at the later checkpoints, in fact, they aren't getting anywhere. Sakura and Shaoran determine that Clow magic is at work.