This is the edited version of the picture. To see the full version, you'll have to go to the Red Curtain. Oh, and if you do, be prepared for some male nudity! ;)
Anyway, I drew this for a prompt on the mononoke_anime community on Livejournal. It took all day with my copics, no joke.
The prompt was:
Medicine Seller and a Mononoke: A mononoke in some way sexually assaulting MS; MS allowing this but using it to his advantage.
Um, yeah. Pretty obvious what's happening below the frame.
Mononoke (c) Takeshi Hashimoto