He was the second youngest son of the Lan family, but he ran away from home because of a rare brain tumor. He accidentally "met" her by accident, and during the days when he stayed at her house, he got along with her so happily and so naturally. That feeling has obviously gone beyond the scope of friendship. After she learned his true identity and illness, he decided to leave again. A year later, when he successfully recovered from the most radical surgery abroad, they met again and faced too many changes and obstacles. Can the two of them go back to the simple and beautiful time in the past?