not exo but rageprufrock's hikaru no go smutfic has one of my favorite opening lines:

Ogata admires Shindou, he really does, the boy's tenacity and unwillingness to give up, his obvious genius at Go, the amount of sheer effort and love he puts into his game--and also, and most importantly at the current moment, the way his ass is tight and hot and sweet around Ogata's cock.

http://glitterati.talkoncorners.net/fiction/relative2.php