Park Hae Rin and Yoon Yu Ri has always been the best of friends ever since they were in middle school.

A few years later, they became seniors in Seungri High School, an elite high school filled with students who come from rich family background and foreigners who come as exchanged students.

Despite all of this, Hae Rin is still just a normal 17 year-old girl who is looking for a reason for her to enjoy her senior year.

On one fine sunny day, Hae Rin tag along with Yu Ri (by force) for Yu Ri's date without knowing the consequences.....