On the most unlucky day, Hui Nuan met a boy who was five years older than her in the waiting room. They fell in love with each other, and then they set off on their way home, thinking that they would never see each other again. However, Hui Nuan traveled to his city after breaking up with her friend, firstly because she yearned for that city, and secondly because the boy gave her an inexplicable sense of trust and security. The story continues, their fate will not end with that noisy waiting room, gorgeous fireworks will bloom in another place...