Sehun's finally 20 years old, out of his parent's grasp and into his own young world. He decides that college wouldn't be the place for him and instead moves out of his parent's house into a small apartment. Working at the downtown library as a shelfer, Sehun's eyes catch a young pretty girl, slumped on the floor against the wall, reading stacks of books with her ears plug to who-knows what she was listening to. 

She would be the start of his summer.