Why did Zhang Beisen jump off a building?

"Twinkle, twinkle, shiny star" The man argued that Wan Sen didn't jump off a building, but was pushed by Gray. After knowing that Zhang Wansen jumped from the building, Lin Beixing wanted to find out the truth and save this affectionate and shy boy.

Her crossing seems to be to save each other, but in fact, by discovering the beauty of the past, she can face up to the present. Because although life is terrible now, there have been people who care about themselves and love them deeply for such a long time.

Twinkle, twinkle, bright stars;

Shiny, shiny, shiny, shiny, shiny, shiny, shiny, shiny, shiny, shiny, shiny, shiny, shiny, shiny.

In the play, Lin Beixing (karina) will use an old short message to find out the truth about the death of Zhang Wansen, a former classmate, and rewrite a youthful romance with him in parallel time and space.