She - Nan Xi, is the daughter of Nan's eldest son. Due to her parents' job transfer, she transferred to his school and happened to be at the same table with him. She has a carefree, quirky and informal personality. She was influenced by her father since she was a child and is known as a "little musical genius".
He - Gu Xiao, is the only son of the Gu family. He is handsome and has excellent grades. There are many girls chasing him, but he only likes Nan Xi and will always be partial to Nan Xi. His ten-year secret love for Nan Xi has always been buried in his heart.
She, Ji Yan, is Nan Xi's best friend and Gu Xiao's good friend. She is gentle and quiet, and is a good girl in the eyes of her family and friends. Her parents are both doctors and are often away from home due to work reasons. She lives in Gu Xiao and Nan Xi's home all year round.
Nan Xi, Gu Xiao and Ji Yan are childhood sweethearts. They grew up together and have a very deep friendship. Their parents are also very good friends.
Gu Xiao has always had a crush on Nan Xi, but Nan Xi doesn't know. One day later, Nan Xi knows the secret of Gu Xiao's crush, but Gu Xiao has not confessed yet. How will the story between the two of them develop...
