Li Shiran and Lin Keyi encouraged each other to enter the same college during the high school entrance examination. Li Shiran said excessive words to Lin Keyi before the college entrance examination, causing their relationship to break down. A few years later, Li Shiran felt regretful when he returned to his old residence and saw the photo with Lin Keyi. This also corresponds to "This feeling can be remembered later, but it was already at a loss at the time."
Purpose: Cherish the people around you