That late summer is the beginning of the story. Fate is a very magical thing, bringing a group of lovely people together.
I remember that year, your figure shone in her eyes, making that girl believe that it might be true that she would miss this person for the first time.
Maybe it was the subsequent separation that separated each other. That might be a regret, but it was also the inevitable result of meeting later.
Concept: Ignorance, purity and regret in high school