Mistress Iori trains the perverted masochistic crossdresser Naru as her human toilet. She starts by pressing her nose against Mistress Iori's anus to memorize its scent. Naru, on all fours like a dog, brings an extra-thick dildo in her mouth. Mistress Iori inserts the dildo, which is so thick it's difficult to even fit in her mouth, into Naru's anus. Naru must clean the dildo, which is brown and stained with her own feces, with her tongue... Naru's reward for successfully cleaning the dildo is a face-sitting ride with her voluptuous ass. What's more, Mistress Iori even farts as a treat. Kind Mistress Iori gives Naru an enema, as her bowel movement is blocked. When Naru feels the urge to defecate, a cute pink disposable diaper is prepared. As his need to defecate grows stronger, a diaper is placed around his raging erection, and Naru ends up soiling the diaper while Iori-sama stares at his pathetic face as he poops... This is the final stage of his human toilet training. First, Iori-sama feeds Naru the food she has chewed by mouth. After eating a huge amount of food, she then vomits out the food that has been digested in her stomach and feeds it to Naru. Naru's groin gets hard from eating the vomit. Next, Iori-sama inserts calpas, sausages, and gummies into his anus and feeds them to Naru. After quenching his thirst with holy water, it's finally time for the golden showers. The amount of poop is so large it can't fit in his mouth... Naru enjoys it, his erection growing even bigger.