I'm looking for a yaoi or shounen-ai manga with a guy who is in love with his friend. Afraid to tell him this, the guy slept with a "black haired" (I think) guy. In the next day, the young guy felt sick and went to the hospital thinking that he has aids! Then, the doctor who attended was that guy from the last night and some how they end up dating.

Help, please! Thank you in advance!

Kiken na Otonarisan - second story (chap 4+5).