Pretty much, nothing happened in the episode.
It mainly centered on the rainy season and how the girls coped up with it.
It's the rainy season so the whole week was really pouring rain. And the rain is making it hard for Yui-chan to go to school especially when she bringing Gitah. She is so worried that Gitah would get wet so she would rather wet herself just to keep Gitah safe and sound. As a result, she came to school drenched in water!