Kim Jongin and Han Sojin are bestfriends. They've known each other for years.  Best friend, they said. Friendship line will always be there. And none of them wants to break it. Best friend, they said. But how long they will be able to keep everything up before time and fate tear them apart? There they are, walking in two different ways while looking at the same sky, with the same heart-breaking stories.  

Waiting is not an easy task for Soojin. Being a girlfriend of a famous idol secretly after a few years isn't an easy thing for sure. Now it's time for them to accept everything. Sometimes letting go is the only way. Two people, two different worlds, everyone knows it will never worked out.