The Shunned Legends

http://www.asianfanfics.com/story/view/186919/the-shunned-legends-horror-you-exo-exok-exom

Starring EXO-M , EXO-K and Seo Myon

When a young college student stumbles upon a strange book, he never expected to be the cause of mankind's possible downfall. Now he must aid twelve certain males in killing the evil force, that's threatening to destroy mankind and the entire planet Earth.

EXO-K 

EXO-M