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.

Summer vacation has just begun. Konata, the Hiiragi twins and Miyuki go to a summer festival clothed in yukata. Yui Nanami is first introduced in this episode, currently on patrol at the festival. Konata and Nanako chat over an online game. Later on, Konata and the twins meet and do homework together. Back at her house, Konata finds a rare drop and celebrates it with her online friends.

The gang comes back to school after the summer break and Konata is in a good mood because she has become hooked on Marimite. Miyuki is forced to go to school without her glasses because she broke them. Tsukasa recieves her first cell phone, but its life is very short after Tsukasa leaves it in the washing machine. On Lucky Channel, Shiraishi follows up on a fan's request for a certain hairstyle.

Winter break is over, and so it's back to school where the girls have conversations about what they did, ate, and dreamt about during their winter vacation.

It's now time for Valentine's Day, which means that the girls will give chocolates to others, but in the case of Konata, she'll give her chocolate to a character online.

Lster, Konata decides to shop at an anime store she previously went to but realized that the item she wanted was at another store. The employees of the anime shop are determined to get Konata (a.k.a. Legendary Girl A) to buy something from their store this time around.

This week on Lucky Channel, Akira and Shiraishi announce the results of the Lucky Star figure poll, telling which characters will get figures made out of them. However, Akira gets really mad when she learns that Shiraishi will also have a figure made.