Jiu Yuli hid her entire youthful secret love and spent it all on Chen Yu.
The promise he made casually became her obsession for many years. It was only at the end that she suddenly realized that the one who made the mistake first was her young heart. In the end, they parted ways and never saw each other again.
Concept: Most of young people's promises are casual, but one-way secret love ends in regret.
