Kaorin finally gets to visit Chiyo's summer home, as they and their friends try to find a balance between studying and enjoying their usual summer activities.
Sakaki sets her sights on studying to become a veterinary after high-school. For a start, she has to get over her differences with certain felines in the neighborhood, but not without the help of an unlikely ally.
The class struggles to think of another original theme for the culture festival and ultimately decides to expand their previous year's idea of a "Stuffed Animal Exhibit" into a "Stuffed Animal Café".
Yukari takes her class on a school trip to Okinawa. The students take part in some sightseeing, shopping and scuba diving, and get to encounter some of the local wildlife.
With the imminent start of their second year, Osaka and Chiyo worry that they and their friends could be in different classes. Kaorin is also dreading the possibility that she might be taken away from Sakaki.