GD and CL were loggerheads working together at M Holdings. Both vying for a promotion, they were competitive and even the little things will make them bicker for day and night.

One day when Chaerin was helping her best friend Bom to settle down in her new apartment, the unnie found her old high school uniform and in one way or another the dongsaeng wore it out to the streets of Hongdae. Unfortunately for her, she met her arch nemesis, Kwon Jiyong.

After a few rounds furiously denying her identity as CL, Jiyong seems to feel even more interested in her. Will their grudge turn into love eventually..? And...

"How could he not know that she is actually Chaerin?!"