A stories of a two best friend that found out that they have feelings for each other but sometimes fate are are just playing with us isn't it so we humans need to find a way to get over the painful heartbroken.However with a friends that is always there for you the pain might reduced since you have someone to talk to and that is exactly how (Y/N) and her best friend Kang Daniel is.

A very well known heart surgeon, at the right age to experience all the joy world give her but why until all she does is work and nothing more... A story about a girl name Park Herin who has everything that she need with the right people in her life but there is only one thing that she want or maybe someone...

Two human who are connected by an invisible red strings has fianlly found each other , they have a great life however it is not written that they will be with each other forever.Death then knock upon their live and one of them have to leave the other behind, and this is a letter from her to him.