Everything is normal as the four main characters attend a normal day of high school. They discuss different foods and how they eat them. Later on, Kagami gets sick and all the characters go over to make sure she is okay.

It is summertime for the girls; that means one thing: comfortable summer uniforms! Tsukasa and Kagami are fraternal twins, but Konata shows them the similar and different characteristics they share. Konata, Kagami, and Tsukasa each try to put their hair into a ponytail, just to see who looks best. Unfortunately, Kagami is the only one who cannot pull it off.

It is time for tests! Unfortunately, Konata cannot seem to concentrate on studying and instead reverts to slacking off and playing games. She tries to ask Miyuki about good study habits, but in the end she does bad on her tests. Tsukasa got help from her sister and this time got better scores, but Kagami's scores were still higher despite her own scores going down somewhat. Later, Konata and the Hiiragi twins go to a cake café but end up taking too much and must finish it all or pay an extra price.

The girls go to a concert entitled "The Jam of Haruhi Suzumiya".

Kagami explains how much her pet goldfish has grown.

Konata actually finishes her homework, Ms. Kuroi accidentally erases a saved file in one of Konata's games, Miyuki talks smack about Ms. Kuroi, and Konata's dad is thinking about remarrying... or not! April Fool's!

The girls enter their third year of high school, and they see who's in what class for this year. Once again, Konata, Tsukasa, and Miyuki are in the same class, but Kagami is in a different one from them. Meanwhile, Konata's cousin Yutaka and her new friend Minami Iwasaki enter their first year of high school.

On Lucky Channel, it's announced that Akira will have a live concert next week.

Konata and the girls discuss parents who check through their children's e-mails and text messages, how much money Konata spent at Comiket, and how hot it is even though it's September.

Yui meet's Yutaka's friend Minami for the first time, and Minami gets even less insecure about her... growth.

Tsukasa tries different methods to wake up early in the morning. All of them failed.

Hiyori thinks of some good ideas for her manga, but when she tries to write them down, she just can't seem to remember them.

Konata's class embark on a school excursion to Kyoto and Nara. During the trip, Kagami receives a letter from a boy asking for her to meet him at night. What could this boy possibly want from Kagami?

On Lucky Channel, Shiraishi returns from his journey from Mount Fuji and gives Akira the famed Mount Fuji water she wanted. When Akira is disgusted by the taste of the water, Shiraishi finally snaps!