Anime where a straight guy is turned gay by a gay guy?

To be honest i've already seen one and it was...steamy. Can't remember the name right now but there was this guy with long silver hair and the gay guy had brown hair. Anyway you probably know what i'm talking about so don't list that since i know of it already :p I've also watched sekai-ichi (dont remember the last part) + the OVA and jun-jou romantica 1 and 2 and yea.. nothing else i can remember