You can't say no to your girlfriend when she asks you to put the collar on. But, wait-- what's going on? Why do you feel strange? Why do you feel a burning desire to please mistress? (MTF dog girl caption with partial brainwashing/mental changes at the hand of your GF)


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Story Text:


"Fine! I'll put it on," you sigh, shaking your head as you take the collar from your girlfriend.

"Yay!" Vera grins widely and claps her hands. "Thank yoooou! I promise we'll have fun."

How can you say no to such a bombshell? Vera is absolutely stunning, with a curvaceous figure, long brunette hair, and deep blue eyes that peer into your soul. Wearing only boxers, 

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You grimace and put the collar on before shrugging. "Is this what you wanted?"

"Yeeeesss," Vera giggles. "What a good girl you are," she cooes and approaches you, brushing a hand over your chest.

"Girl? What are you--," you start to ask in frustration when an electric shock shoots through you, your bones immediately creaking. "A-- Ahhh! W-- What the fuck!?" Was this a shock collar? No-- it wasn't quite that sensation; something else was going on.

"Just relax. I promise the overall process will feel good," Vera assures you, putting her hands on your shoulders before forcing you to sit on your bed's edge.

"But, what did-- mmm... Ooooh..." You suddenly moan as your limbs start to soften and shrink along with your torso. You feel your insides churn and shift while your chest and crotch ignite with ferocious heat. While your facial hair starts to fall out, your mind grows fuzzy and strange thoughts enter your mind.  'Mistress would never do something to hurt me-- I should relax... W-- Wait, what?'

While you try to get a grip, your ass plumps up in tandem with your widening hips and tightening waist. You feel your every cell change while a ball of tension forms beneath your navel and expands outward. Why do you feel so much cushion beneath you? Why are your testes and cock convulsing? To top that off, why does your chest feel so damned weird?

"Oooh! You're coming along nicely," Vera assures you, sitting down as she puts a reassuring hand on your shoulder.

"W-- What are you doing to me?..." You stammer, your voice cracking and heightening in pitch. Glancing downward, you stare in confusion as what appears to be a budding set of tits extend from your chest. They grow before your very eyes, soon resembling A cups while your nipples thicken and turn rosy pink. All the while, something bursts from your backside while your ears itch and shift. "A-- A girl? Am I turning into a girl?" You ask in desperation, looking at Vera in complete shock.

"The goodest girl! We're going to have so much fun," she insists, standing up as she takes your hands.

You stumble as she pulls you to the mirror, your ass and hips making you sway with each step. Your tits grow past B cup and start to bounce while you quickly realize you're now the same height as Vera. "I don't-- I don't, please..." You whine as she places you in front of the mirror.

"Look! You're turning out so perfectly!"

You stare at your reflection, an androgynous being reflected back. The person in the mirror has broad hips and breasts that continue expanding. A canine tail juts from your backside and swishes against your will while your ears rise. Is this real? Is this truly happening? "Mmm-- uuuggh!" You moan as your womb expands. You barely notice as Vera strips your shorts off, leaving you fully nude.

Meanwhile, your testes ascend with a pop while your genitals lower. Your once substantial cock recedes while your scrotum pulls taut and starts to split as your crotch quivers. Tears in your eyes, you slide a dainty hand between your legs, probing your forming labia and desperately grasping at your cock in vain. It withers into a tiny nub, a fleshy hood enveloping it as it nestles within your perfectly shaped, feminine sex. "I-- don't want-- a pussy," you cry out in denial while shaking your head, trying to ignore the pleasurable waves coursing through your new genitals.

"You'll get used to it, hon. Being a girl is way better, I promise. You'll get to wear such cute outfits and enjoy mindblowing sex! Also, you'll have me as your mistress; as long as you're obedient, you'll be loved and well taken care of."

"M-- Mistress?..." You whine and moan as your vulva fully takes shape, your vagina and new urethra opening and marking the end of your masculinity. Up higher, your tits grow into the D range while your facial features soften. A set of pointed canine ears rest atop your head as your despair mixes with a burning need to please and obey mistress. 'This is wrong-- she's evil... She's-- I can't... I can't disobey mistress-- she loves me. I need-- I need her love.'

"Look? You're just about done now... A couple of inches shorter than me; how adorable," Verta giggles, brushing her fingers over your collar. "Why don't you go get me some coffee, pet? Just the way I like it, and I'll reward you and tell you how much I love you."

You want to scream and fight, but are unable to. The thought of mistress complimenting and loving you brings you unfathomable joy. You've never needed anything more than her approval. "Yes, of course," you reply weakly, your ears perking while your tail wags. You then trot from the room completely nude and head to the kitchen.

As you start making coffee, you marvel at the way your body moves; your hips swaying with each step, the bounce of your hefty breasts, and the warm, tingly pussy between your legs. "I shouldn't make her-- this is wrong, this--," you try to fight while biting your lip and getting flooded with fear. Amidst your resistance, the image of Vera calling you a good girl and giving you head pats enters your mind, and your heart flutters.  

With lips curled into a dazed smile, you get to work on the coffee, your tail swishing rapidly. In the back of your mind, you can't help but hope mistress rewards you with a female anatomy lesson.