Chapter 3: My favorite Fan fiction recently is Revolution!!
Read that. It was so amazing.
Also
Absolute Chanyeol
and
48 hours
Omg 48 hours killed me ASDFASDGASDG WHYY

please put 48 hours in your list.its really really good story btw

Chapter 4: Omg... Chapter four broke my heart! ;_;

My recommendation is from winglin though. I hope it's okay.
This is one of my favorite and the one that pushed me to finally write one of my own stories.
http://www.winglin.net/fanfic/Elemental/
It's quite short, but it's just amazing. The author is in one of my top 5 list of favorite fanfics authors. Her stories had become some sort of guide book for me.
Hope you enjoy reading it.

Hey, I know I commented here before, but I just want to ask. Is it okay if I recommend stories that aren't Kpop? Because I only got into KPop recently, so most of the fanfics I read are non Kpop. But a lot of them are just amazingly written that those have become one of my main inspiration to write

I recommend staticdream's stories. They're mostly 2pm fics but I tell you, it's all worth it. She's awesome.

I'm glad that you started this. I've been observing a lot, and I noticed that the one got featured either has SHINee/EXO/Infinite/SuJu (KPop idols) in it + OCs.
I already have few ones that I fond of, but unfortunately all my favorite fics are not posted here. And also the fact that most of them featured Taiwanese artists and not kpop idols. So I can't really recommend anything right now.
If I find something interesting, I'll tell you.

After-School Activities by Gelisi. Pretty much all of Gelisi's stories are perfection. He's an amazing author.