The outline of the story is only a preliminary plan and does not rule out the possibility of changes along the way.
The general idea of the story is that a girl who was originally living a happy life met an outstanding 16-year-old boy at the age of 13 and fell in love with him. In order to be with this boy, she, who originally had mediocre grades, studied like crazy. After finally getting admitted to the boy's university, she discovered that the boy had to choose to be with a girl from a rich family for the sake of his future. After experiencing such heart-wrenching pain, the girl did not feel depressed, worked hard and made progress, and finally found happiness.