Based on the song, 이별을 배웠어 (Always In My Heart), sang by 2AMs Seulong and Red Velvets Joy.A sad, yet beautiful love story between Mark and Cheria.  ForewordSometimes, things just dont end the way we want it. Things change, people change.Im more thankful for you to exist in my life.I hope youll be happy, without me.Please know that I will always be here for you, if you need someone. Hello! This is my first attempt on writing a fanfic, I actually have the inspiration of writing one so I have decided to write one! It will be featuring on GOT7s Mark, one of my lovely kids and I hope you guys will like it! :-)