"There's my new buddy!" The anthro rottweiler suddenly exclaims as he picks you up and pulls you inside the room, slamming the door closed and chuckling to you as his incredibly buff body keeps a tight grip on you. You're effectively being hugged up above the ground, but thankfully not crushed. "Don was saying how a new fella was gonna be visiting soon, and hey you even got the beast briefs!" He chuckled joyfully, his nubby tail wagging out of sight. He used your name, and the fear quickly settled in further with the stench of the room. Looking around now from inside the room, you could see that the other corner hidden by the door from earlier had a pile full of the beast briefs, but they were all filled to the brim with poop from seemingly innumerable beastmen.
After sitting back down on the couch you originally saw him on, he set you beside him. Your unwavering fear paralyzed you, and you just stare at him with too many questions to pick from. He stares back at you, smiling as if this were all completely normal. "Well, aren't you gonna put one on?" He questioned with a confused but still happy tone, almost like this were an awkward conversation during a party you didn't even want to go to. With some reluctance, and your fear slowing dissipating with how jovial he was being, you decide to indulge him and take out one of the beast brief diapers. Looking up at the large, incredibly musky dogman, you hold back a groan and slip them on. They fit comfortably just under your skirt, and after just a moment or you, your crotch begins to warm up, and your cock bulges out against the soft and unusual fabric. "Ooh..." The rottie says with a grin, his own cock tenting his diaper.
Unable to hold back the sudden urges and intense waves of pleasure, you reach into the front of your diaper and stroke your erect cock, jaw dropping and moaning somewhat as you look up at the rottie looking back at you. You both continue to stroke yourselves, exchanging nothing more than your own moans and his panting, drooling tongue. As if at the exact same time, you feel a strange sensation, one that is all too familiar for you, but has never quite felt so... freeing until now. Without much of a signal, the rottweiler man lifts up from his seat on the couch and moans out, eyes rolling up as an incredibly loud and wild farting sound comes from his padded butt. The scent quickly hits your nose, and it only further fuels your unusual arousal as you just stare in awe at the beastman beginning to fill up his diaper. The seat he had originally occupied was now weight down again, but instead of from his butt and leaning back on the couch, it was the bloated backside of his horribly stinky beast briefs.
As you feel the same sensation getting close to your own hole, you realize it's much too late to even attempt to hold it back. With one quick push, you feel a massive log of shit push out of your hole, squeezing out into the back of your diaper and resting against your butt. The size and scent isn't human, and the weight of it in your diaper is much heavier than you were expecting. How did that even come out of you?! Just as you were about to let out more poop, you notice your arms, then your legs, and the rest of your body, are changing...!
What do you turn into? The rottweiler eagerly watches you as he continues to stroke himself, still pooping! The moment you begin to grow a tail or fur, he gives you a wink and a thumbs up.