This story tells a seemingly ordinary, but vigorous love story. Fang Yilun: He is a boy who has suffered from congenital heart disease since he was a child. Because of this disease, he chose to isolate himself from the world. A handsome boy with a melancholic aura. But he is not alone, he also has several friends who are willing to share the difficulties with him, Zhuang Yuanyi, Gu Yuzun, and Kang Yuncheng. One day, when he was alone in the classroom, listening to music and completing his homework, he saw a girl in the class next door, Ding Xiaojie, walking around, mumbling words and holding a book in her hand.
He became curious about Ding Xiaojie, and slowly, the two met and fell in love. But because of his illness, he chose to study abroad and broke up with Ding Xiaojie.
A few years later, they entered the society and met each other again, but the love between them still existed...?