I am planning to start a fanfiction full of mystery and mainly science fiction.  Can you guys please suggest characters that I should use, I need couple characters that would work best for this type of story. 

I was thinking of:

Taemin and Naeun

Sehun and OC 

Other (please if you have other couple character please let me know)

COMMENT OR MESSAGE ME!

I WOULD APPRECIATE IT VERY MUCH. :)