Guarding Sweetheart's Black Cat's Dream

Five years can change a lot. It can change a person from a down-and-out boy to a company director who looks down on others; it can also change a person from a spoiled little princess to a poor homeless girl; The human heart can modify a relationship... We parted ways five years ago and agreed to see each other again.Five years later, it is increasingly unclear whether the goodbye will be to see each other again, or never to see each other again?