Throughout Golden Week, Tsukasa and Kagami have been playing together. However, Tsukasa does not know that her sister has actually been waking up earlier and going to bed later than her in order to study and finish homework. After the break, Konata does an all-nighter and manages to obtain an above-average score despite doing no studying during the short vacation. Later, Konata decides to get a job at a cosplay café in order to fund her otaku desires.

The group, plus Cousin Yui and Nanako, go to the beach for some summer fun. After Yui races down the road, and Nanako gets really lost, they finally make it and spend a night in a Japanese inn. After a day at the beach, and Nanako becoming too drunk to drive, they go back to the inn for a shower and to spend another night. After arriving home, the twins have to clean their bedrooms, Konata discusses cleaning tactics with Kagami, and Miyuki is told she has to go see the dentist, or her mom is bringing the dentist to their house.

Konata and the girls discuss the problems with sleeping during trainrides.

Christmas is around the corner, but before that, Konata learns the truth about the existence of Santa Claus, Tsukasa and Miyuki talk about dentists, Kagami thinks that the people in Konata's class are a little too familiar with her, and Konata has to work during the holidays.

Konata's cousin Yui insults the cops on television (despite the fact that she's a cop herself). The girls talk about how once a person is over 25 (i.e. their teacher Nanako Kuroi), a Christmas cake is any old cake to him/her. The girls also discuss static electricity and why Konata doesn't get shocked by it.

On Lucky Channel, Akira announces that she will appear in the actual show starting in the next episode.