My name is Kim Taeyeon and I work as a loyalty tester. One day a woman called Jessica Jung came to me to test her girlfriend Tiffany Hwang's loyalty. Even though Tiffany might be a loyal girlfriend to Jessica, I couldn't resist the temptation that is Tiffany Hwang. The two of us soon became closer to each other just like Jessica and my best friend Yuri...

Kim Bona is going through lots of personal problems during their time of promoting themselves as a rookie group. Since she is the leader of the Wonder Unit and one of the older members of WJSN in general the girl doesn't want to confront their leader with this matter. One of these days Bona gets help from a bandmate that soon becomes shoulder to lean onto and Bona learns to relieve her stress in rather interesting ways...