The introverted and shy female protagonist met the male protagonist who was like a little sun and kept her warm. The male protagonist fell in love with the female protagonist and boldly pursued their love. The story was supposed to be a happy one. However, after the female protagonist was diagnosed with leukemia, her life was permanently fixed at the age of eighteen. The male protagonist died in a car accident while rushing to see the female protagonist for the last time.
Concept: Their love started in midsummer, but ended in midsummer