I was requested to make a sort of list of fanfics that are great in my opinion so here you are:

Act of Obsession [M] [Complete] starring Jaejoong and OC {my ultimate fav}

⚜ Draco`s Flames ⚜ [Complete] starring Kris and OC, and Tao and OC

Behind Closed Doors starring Yunho and OC

I'VE FALLEN FOR YOU [M] [Complete] starring Nichkhun and Victoria

Two Faced Idol [M] starring Minho and You

Marriage Contract With The Walking  starring Junhyung and OC {not rated btw}

Suddenly Royal starring Khuntoria and 2Hyun

Deliria High: The Dance Partner starring JR, Ren and OC

Deliria High: Breathing Fire [M] starring Kris and OC

Did My y Roommate Ditch? starring Zico and You

Series of creepy drabbles with exo starring all members of EXO

My Arranged Marriage with EXO-K's SeHun [Complete] starring Sehun and OC

Eggs and Ramyun [Complete] starring Daehyun and OC

The Sharpest Lives starring Kris and You

You Arrogant _______! [Complete] starring Daehyun and You

Arrogance and Ignorance starring Kai and You

Changmin, The Devil. [M] starring Changmin and OC

Don't Upset the Puppet Master [M] starring various Kpop Idols and OCs {no }

Starlight Tears [M] [Complete] starring Woohyun and OC

Kiss Me [M] starring Junhyung and You

I HATE MY HUSBAND [Complete] starring Sungyeol and OC

I sat into the wrong car! [M] starring Jaejoong and OC

His Annoying Games [Complete] starring B-Bomb and OC

Bad Boy [Complete] starring Kai and You

That Player [Complete] starring L.joe, Chunji and You

Dream Boy [Complete] starring Baekhyun and You

The Script [Complete] starring Kyuhyun and OC

In Love with a Criminal [M] [Complete] starring Kwon Jiyong and OC

Married To A Stranger (Gi Kwang) [M] [Complete] starring Kikwang and You

Tied Up [M] starring Junhyung and OC

Halmeoni [Complete] starring Hoya and OC

My Tutor Is Younger...Than Me?! [Complete] starring Zico and You

When Tabi Cheats [M] [Complete] starring TOP and You

Captured [M] [Complete] starring Jaejoong and You

Tame Me, My Slave [M] [Complete] starring Jaejoong, Siwon and OC

Happily Ever Never [M] [Complete] starring Joon and You

Living together with my enemy [Complete] starring Gongchan, Zico and You

Marrying Mr. Arrogant [Complete] starring Hoya and You

B2ST Café [Complete] starring Junhyung and OC

Those Three Magical Words [Complete] starring B-Bomb and OC

Finding Mr. Un-right [Complete] starring B-Bomb and You

Rhapsody ★ [M] [Complete] starring Yoochun and OC

Yes, Mr. Teacher [Complete] starring Woohyun and OC

Well that's all I've got off the top of my head for now~ 

Most are complete because I usually read completed fanfics :P