Don't worry, I write and I rarely get feedback

Ok, I'm not a fan of the genre of your fanfic, but Imma give you some feedback regarding it.
1) Correct the tag "originalcharater" to "originalcharacter". That should make it more visible.
2) It's a very distinct segment. I honestly can't relate to the YT vids that you have and to a lot of the terminologies. I'm not even sure if f(x) is into that genre of hobby or interests. That being said, you might want to identify who are the readers out there in AFF who share the same interests as you have and then share your fanfic with them.
3) In Chapter 2, there's a big- paragraph. I was afraid at first that I'll see it again but thankfully I didn't. That's good. Try to avoid that as much as possible so that it's easier to read.
4) I dunno... for some reason it feels kinda flat for me, like f(x) characters, portraying them as they are in real life, are so shallow here. I suggest you really dig deep and research into each member's personalities and intertwine them with your own insight, but keep the real deal dominant, since you are portraying them as f(x) after all. I doubt Krystal swears and says "" in front of random people she just met in real life.
5) You also probably want to change the intro/forward. Identifying CJ in terms of his nationality and heritage is fine, but it doesn't relate too much to the story. I suggest you take it out. In my fanfic, I identified my OC as a foreigner, but I didn't really tell what his nationality is because it doesn't have to do anything with the story. I don't know how many Filipinos out there in AFF, but yeah. Make it ambiguous in the intro.

I hope that helps you improve your fanfic and gain more readers.

Do you want the nice feedback or honest feedback?