Choi Sooyoung turned cold towards Taeyeon after waiting for her for so many years, only to have her end up with Tiffany. She's very close to her roommate, Jessica.

Kim Taeyeon loves and belongs to Tiffany since 5 months ago. Sooyoung was her best and closest friend until she suddenly turned cold. 

Hwang Tiffany's together with Taeyeon. But she's suddenly starting to doubt her feelings for her when she notice how jealous she get when Sooyoung and Jessica acts intimate.

Jung Jessica is Sooyoung's closest friend. They act a little too intimate with each other at times which eventually led to her falling for the tall woman.