Everyone's favorite gang of high schoolers is back for their final year. This time, the gang takes a trip to sunny Okinawa, where Osaka plays with sea cucumbers and looks for something to eat. Yomi announces her intention to join InterPol, and Sakaki gets a cat that will (gasp!) let her pet it! When the gang gets together for a camping trip, Mr. Kimura makes his big confession to one of the students! Meanwhile, Chiyo-chan seems to be disappearing under a horde of pigeons...
It's all the zaniness and tongue-in-cheek comedy you've come to expect from this popular series, culminating in the bittersweet graduation ceremony where everyone goes their separate ways.