It's Konata's birthday, and her family sets up a surprise party for her when she gets home from work. All goes according to plan until Konata calls and says that her coworkers are throwing her a party and that she'll be coming home late.

The girls discuss what their goals in life are.

Kagami has a bad day when she gets bothered by little annoyances and ends up going to a store to buy a drink but forgets her wallet.

Things get worse for Kagami when her older sister Matsuri scolds her for neglecting to buy groceries for dinner.

On Lucky Channel, Akira and Shiraishi have a special guest: Meito Anizawa, the manager of the anime store that desperately wants Konata to buy something from his shop. He talks about the three factors that determine an anime's success.

此方的生日到了。大家都像此方送出了自己特意准备的礼物。小镜还是像往常一样吐槽此方的小矮个，为此此方愤愤不平。另一边，小丰正在为此方的惊喜生日会偷偷地做准备。放学后早早的回到家里布置现场，爸爸和成实姐也着手开始准备。万事俱备只欠东风，突然此方一通电话浇灭了大家的热情。原来，此方打工的cosplay咖啡厅已经为此方准备了庆生会，所以不吃晚饭了，回家也会很晚。面对着满桌美食，爸爸成实姐和小丰三人只好默默的吃掉。。。

Es ist Konatas Geburtstag und sie ist glücklich, volljährig zu sein, denn sie kann jetzt legal Spiele nur für Erwachsene spielen. Später beschließt Konatas Familie, eine Überraschungsparty für sie zu veranstalten, aber ihre Pläne scheitern, da Konatas Mitarbeiter ebenfalls ihren Geburtstag feiern.

姉の「成美ゆい」と妹の「小早川ゆたか」は片方が片方の何かを吸収し合っているという。虚弱体質の「小早川ゆたか」と健康一番の「成美ゆい」。そういえば、「高良みゆき」と「岩崎みなみ」の二人も、片方が片方の何かを吸収し合っているような・・・。