"Those who like to be alone have someone they can't wait for in their hearts." Zu Yi, who always thought that he just liked being alone, gradually found that he often thought of one person and recalled the time together. They were very happy, but very short-lived, two days a week, less than 4 hours a day. Because that's her teacher.
The thoughts that he couldn't express, the feelings that he couldn't let go of, just stayed with Zu Yi.