"So you still refuse? That entire ordeal wasn't enough for you? Well then, perhaps it is time I give up on my initial plans. If you have no plans to cooperate with me then so be it, since you refuse to be an adorable pet, you shall become no more then an adorable decoration."

This was DEFINITELY the wrong decision. Why would you do this after he showed you what a good time he could be?

Argentum reapplies the tape, holding you back down before you have a chance to get away. After doing so he pulls out a spellbook, you remember that the kitsune was a mage, perhaps it wasn't the best idea to defy him, but it was too late. After a couple pages he finds what he was looking for.

"Ah yes, immobilization, such a pity, I was hoping we would get along. Now, make a cute face, it'll be the only one you're able to make again."

You scowl at him and he sighs, obviously disappointed, but reads his incantations nonetheless. With that you feel your body start to immobilize. It feels like crystals forming at your fingertips and toes as it spreads up your limbs and eventually coats your whole body, leaving you essentially a living figurine. 

You keep your senses, able to see what he's doing, watching as he pulls something else out from behind a desk, a sewing kit. He sets it down on the table next to you with a thud. The shirtless man stands up again and reaches for his pant zipper, pulling it down and revealing his tattered briefs underneath. His fat cock bulged against the skimpy underwear, but the real treat was in the back. After he took his pants off fully, he started removing the tattered briefs as well, fully revealing his nude figure.

"You know little one, before when I was stripping for you, it was an erotic moment, but now that you've rejected my affection, I can feel nothing but disappointment."

He grabbed you and the sewing kit and got to work. He tied some thread around your hands and legs repeatedly, like a button, before sewing you into the back of his briefs. He took a moment to admire his handiwork, he was very talented, it looked like you belonged there.

"You know little one, perhaps you should be honored, this is the one pair of underwear I own and I wear it nearly every day. Now you get to be a part of that, and you're just as adorable as before. Of course I wished we could've gotten along, this is a great disappointment, but after seeing you tied down there? Maybe it's where you were meant to end up. Don't worry, this will keep you safe."

With that you watch in horror as he grabs the pair of underwear you were now sewn into and begins to put them on. Wow... fuck... this view was amazing. You looked up and saw the massive glutes above you, with a good view of his dick and balls too, it was the most impressive view you had ever seen. His legs were thick and muscular, and his ass... his ass was just perfect. Each cheek was at least the size of a building, if not bigger. If your body wasn't almost entirely immobilized, you probably would've came from the view alone, but you couldn't. Instead your dick stayed flaccid and leaked an unending amount of precum.

"Oh it looks like the little one is having a good time after all... I'm feeling better about this by the second."

With that, Argentum wasted no time introducing you to your new home, where you would spend the rest of your pathetic life. He pulled up his tight briefs and you were lodged unforgivingly between the two masses. You went into sensory overload. His crack was so expansive and sweaty, it was like you were being locked in a sauna, but you couldn't help but enjoy yourself. His ass was well maintained, but not necessarily clean. It was obvious some sweat had gathered on the hairs and gotten stuck, creating a musky, salty smell that overtook your brain. You couldn't call it hell, it was soft, and warm, and honestly a little comforting, but it was nothing close to heaven. It was your new home.

As time went by Argentum stayed true to his word. He never once wore another pair of underwear, and you were reduced to nothing more then a cushion for him to use and abuse. For a while he talked to you, still calling you "little one" but eventually that ended too. 

Years later Argentum took on an apprentice, a lively young man, much more brash then Argentum had been at his age, but coincidentally, just as beefy and attractive. And so began the tradition of passing down the underwear to the next generation of mages. The stasis spell kept you the same, but your mind was beyond gone, becoming nothing more then a catalogue of asses. Each one unique in it's own way but eventually they all just meld together until the only thing you can think of is ass.