Min-jae and Seo-yeon are no different from ordinary 17-year-old high school students. Min-jae is silent and sensitive, yet a good student. Seo-yeon who plays the piano wished to enter an arts high school but failed. As they grow into adults, their surroundings and the reality they face get harsher. These two somehow similar but different friends get closer as they overcome their growing pains together.
The story follows the pain and growth of 17-year-old Min Jae and Seo Yeon. Min Jae is an ordinary, male high school student. He doesn't talk much and he has a bit of a sensitive personality. Min Jae gets good grades and doesn't cause trouble.
Seo Yeon attends the same high school as Min Jae. They also graduated from the same middle school. She is an ordinary, female high school student. Two years ago, her parents divorced. Since then, she has lived with her mother.