it's time for the Sports Festival and Yukari wants to defeat her friend Nyamo.  She offers to buy her class drinks if they do.  Kagura's is an athletic girl but Sakaki beats her in the race and Yukari's class wins the unofficial competition.  Nyamo gives the prize money to Yukari but then takes it back since she owes her that much anyway.  Now Yukari must buy the class drinks without the prize money she had counted on.