It is a collection of short stories, one chapter is a short story, occasionally mixed with a few essays... Is it considered prose?｜｜｜｜
"A small episode in the past" is the author's expectation that Xingyue and Moon will be together in the future, but due to certain factors, they travel to the past, which is the time period in the fifth part. They deliberately avoid their past selves, but they appear beside them inadvertently. It is a light-hearted sketch.