When you have a lot of free time and don't know what to do,
You have a lot of time to reminisce and fantasize.
Past, present, future.
When you are doing nothing, all kinds of memories and trivial matters from the past become more and more obvious.
Do you know the days after school is suspended?
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Okay. . This is what the author thinks, "Oh, it's so boring, I don't know what to do." . Then suddenly this subject came to mind. .