Mistress Iori teaches a perverted masochist cross-dresser, Naru, as a human urinal. Start by placing your nose perfectly against Iori-sama's anus and memorizing the smell. Naru crawls on all fours like a dog and carries a very thick dildo in her mouth. Iori-sama inserts a dildo that is so thick that it is difficult to hold it in her mouth into Naru's ass hole. Naru has to clean the dildo, which is brown and dirty with her own poop, with her tongue...