Hayun is a problematic girl who only wants finish high school, Iseop is a soft-hearted boy who cries too often. Two teenagers with a very different nature come together as friends by sitting at the same table in class. They are jealous of each other because of the things they don't have though they find solace in each other's company.
Gu-byeong is unexpectedly treated to a meal by Jo-song on his unplanned journey. After meal, Jo-song starts to call him ´son´ and Gu-beoung doesn´t understand why he keeps doing that.
