So I know that f(x) 4 years anniversary had already passed, I couldn't help but bring it up again because of an amazing fanmade video I watched on Youtube. This video was amazing, and it made me cried several times while watching. 

I just wanna share with you in case you haven't watch it yet.

Here's the link: https://www.youtube.com/watch?annotation_id=annotation_2518343229&feature=iv&src_vid=YNyLP0_nb4U&v=ZSYmoY1qkO4