It's Not Weird Is It...?
Yūto, Haruka, Mika and Nanami become increasingly worried about Hazuki's attempt to distance herself from the family and thus decide to follow her on a shopping trip, meeting up with various familiar faces like Yūto's otaku friend Nobunaga, Yūto's sister Ruko and their teacher Yukari. Mika and Nanami eventually becomes distracted in buying lingerie, leaving Yūto and Haruka to the job and almost came to a conclusion that Hazuki was about to get married and quit her job. Before going home, they had a misunderstanding with a bridal shop where they are thought to be customers and were given a chance to take a portrait together with Yūto wearing a tuxedo and Haruka in a wedding dress. That night, Hazuki, much to everyone's relief, explains that she is not quitting, but was just going to a hardware store, which was located above the bridal shop, to fix her chainsaw.
Aired 01/08/2008EP 4 - It's Not Weird Is It...?

Haruka Nogizaka's Secret
The story centers around Yuuto Ayase and his classmate Haruka Nogizaka. While Yuuto is rather ordinary, Haruka is very attractive, intelligent and rich. Due to this, she is the school's most unattainable girl and is so idolized that her classmates give her the French nicknames "Nuit Étoile" (The Silver Star of the Night) and "Lumière du Clavier" (The Shining Princess on the Piano). One day, when Yuuto goes to the school library to return a book, he stumbles across Haruka and her darkest secret—she is a diehard fan of anime, manga and the otaku culture. Yuuto promises to keep her secret hidden and the two become close friends. Yuuto does his best to help Haruka with her secret hobby while developing his relationship with her.
(Source: Wikipedia)