Hello everybody~! I'm hear to clarify some things from my fanfic Numb . 

Numb is about Wu Fan and YaLi; they're a couple who have been dating for a while and during the second chapter, it talks about what happened before. The second chapter is talking about two winters ago and the events that have taken part in that winter. Wu Fan is a business man who had to go on a trip, prior to that, she met Minseok while she was out and they developed a relationship and when Wu Fan left, they went out just like he did, and he saw them out on the day he came back home. Then the winter after YaLi had Minseok, Wu Fan met a girl and they developed a relationship. 

The relationship between YaLi and Wu Fan is that they've been together since they were in diapers. They've known each other since they were young and because of that, it made both of them want something new, which led them to cheat on each other. 

Basically, they were tired of the same routine and wanted thrill in their life. 

OTL . Life when I try to explain . . .  Hope that made it clear. I would switch the chapters, but, I like them the way the are. . . . ^^