This drama is not Korean, but it's surely worth watching. The main character is very crazy and thinks all men are in love with her which leads to some very weird scenes. lol Here is some info from MySoju which has all episodes. The first episode has some sound issues, but the rest are ok.

Alternative Title: Anna-san no Omame / The Best Friend of Beautiful Anna
Genre: Comedy, Romance

Film Date: September, 2006

Total Episodes: 10

Japan Casts:
Anzu Sayuri, Becky, Daito Shunsuke, Hagiwara Nagare, Hasegawa Tomoharu, Ikeda Tsutomu, Jimbo Satoshi , Kashiwabara Shuji, Kinouchi Akiko, Kirishima Yusuke, Kusakari Masao, Matsushita Moeko , Murakami Kohei , Nakamoto Koji, Takahashi Hitomi, Takizawa Saori, Tokui Yoshimi, Watanabe Hiroshi, Yamashita Yorie

Description:

Anna is everyone’s dream; beautiful, intelligent, kind and elegant. But in this drama, she is not the heroine... it is her best friend Lily. Lily is a girl who is overly confident of her own beauty and fantasizes that the whole world is in love with her. She even feels sorry for Anna who is always chased by the boys... as she believes that they are using Anna to become acquainted with her own self. --TV Asahi