Its slightly dark inside as you feel around. You start to wish that you had a heavy coat to wear. You cuddle up in another corner, hoping that you can survive the night.
You sleep for a few hours and realize that you are warmer that you expected. You feel very hot, so you try to shred away your clothes but you realize that you don't have any on. And something is cuddled up close, something big warm and fuzzy. You feel around with your hands and find that it is a huge animal, soft and white. You are startled when it stands on all fours and looks at you. You see that it is a huge polar bear, a female at that. You begin to shiver again as the warmth goes away. The bear leans in and noses at your hand. You calm yourself and realize that she doesn't mean to harm. You pet her huge head softly as you see that your hand is changing slowly, thick white fur spreading and huge claws growing quickly. The fur starts to race down your arm as you become aroused by the situation. Your body starts to increase in size, becoming more muscular and filled with fat. You look down at your penis as it grows in size, ten times the size you were before.
The female polar bear turns her rump to you as you look at it. Very huge indeed. Your own rear starts to increase in size, into a big huge bear butt. You try to stand, realizing that your two feet are now big bear paws with long claws. The female bear flips her stumpy tail around as you cannot contain yourself anymore. You lean your face in and take a big whiff of her huge bear butt. Your face slowly extends into a muzzle as your ears become rounded and filled with soft white fur. You push yourself on top of her, your huge polar bear cock slides in slowly as your rear fully expands and a stumpy tail pushes its way out above your hole. Your body is almost changed as the fur races across your back and belly, you start to thrust as she clamps down onto your big bear cock. You pre heavily, getting rid of your human seed, then slowly filling her with your bear cum. The fur completely spreads its way as you fill up in size, becoming the new attraction at the zoo. Your now a huge polar bear, you cum inside her deeply and heavily. as you let out a roar of ecstasy. The pretty polar bear that once kept you warm is now your mate, and soon you both will have cubs. You pull out and cuddle your new mate, keeping her warm now, knowing that this is what you were meant for.