I'm looking for a multi-chaptered Darren/Chris. Basically, Chris is a virgin and when he found out that Kurt and Blaine are about to make love on screen, he decides that he doesn't want it to happen before he loses his own virginity (there was something about Kurt having is first kiss before Chris, too). So he asks Darren to help him out. The story is really sweet, Darren is actually in love with Chris, and they end up together in the end.
ETA: Found! Turn the Lights Down Low by oddwritesstuff