The most beautiful thing in the world is to accompany your favorite person from school uniform to wedding dress, and to accompany your best friend from canvas shoes to high heels. In this most beautiful early summer, she, Sunuo, met him for the first time on the rooftop. However, their meeting doomed their fate. After experiencing all kinds of misunderstandings, partings, and even life and death, he never gave up on her who was the most perfect in his heart.
After three years of separation, when she returned to the place that made her sad, everything changed. He became more indifferent, just because of her, thinking about her all the time, day and night. She, Suno's best friend, became more haggard, and even lived in an unhappy world every day. Everyone thought Suno was dead, but when they saw her, their eyes were no longer dim, but bright, and the three daughters wanted to kill her...