The Last Secret Before Graduation

Youth campus 1v1 single female protagonist "In a youth full of people, I just need to look at her." "For example, if the time shuttle really exists, maybe countless lovers will eventually get married; if the time shuttle really exists, maybe that winter, I won't let you go home with swollen eyes from crying..." It takes the male protagonist as the main perspective and is adapted from the author's true story. Those unspoken words in my senior year of high school...