Heya!

Uhm, I'm looking for a yaoi manga of a guy who...I don't really remember what happens, but a little (miniature) boy fairy appears. The guy is surprised at first that the little boy is so sensitive as he touched him, but starts experimenting with a paintbrush on the boy. When the boy climaxed, he turned into a real boy and said that the guy would be cursed. Please help. I think it's a One-Shot.