Nonoka gets beaten up by the Ceolors until she admits she hay fever... then they go on a mission to uproot all the trees to save the town from allergies.
Except, Yui keeps stopping Sat-chan when she's just about to use her Extra Virgin Oil attack on a tree, because there's something about that type of tree that they like and don't want to take down. Later, Nonoka's sister sees the Colors fighting a tree, and tells them that's not a tree that is producing pollen, and says there are no trees like that in this park and says Nonoka was lying about being sick (probably to get them to stop trying to knock down trees).
Some time later, after Sat-chan gives Yui a really cute new hairstyle, they get out their walkie-talkies and start playing Hyper Hide and Seek... but Yui can hear everything the other two are saying on her device, so she starts yelling to herself so she can't hear in order to make it fair.
Yui wanders the town looking for them, and runs into Pops and he tells her the range on these walkie talkies is only about 30 feet. Then she runs into Sat-chan's mom and Saito-san who is hanging out with her while on patrol. I didn't even know they knew each other until now. Saito ruins their game by telling Yui exactly where the other 2 went to hide.
Yui is like "I was already planning to go that way, okay?"
After finding Kotoha, she helped Yui search for Sat-chan. They heard Sat-chan's voice on the walkie-talkie saying "I can't breathe, help!", and when they found her lying down in a chu-chu-cabrilla costume in front of a bunch of panda statues, they didn't figure out that was her, and thought that the chu-chu-cabrilla was being sacrificed to the pandas. The episode ends there without a resolution on what happens to Sat-chan.