Forgotten memories, then all these are just memories, remembered by some people, forgotten by some people, real things that happened in the past, and real feelings and moods.
After the memories, meeting each other again was an unexpected encounter. We passed by each other, but then we looked back. The intersecting eyes made one feel strange and familiar, while the other's eyes showed no fluctuation. They looked at each other with a smile, turned around again, and walked away in opposite directions.