Three young people with different personalities came together. But the cruelty of life exploits their youth. Happiness is like a stream of light. And who said goodbye to this world in advance. They know how to cherish them more than the flowers in the greenhouse. Perhaps enduring sadness is the first step to growth. But it's tiring. Many years later, Chen Sisi missed it very much, that fleeting happiness, so absurd and beautiful. That feeling is always there.