"I can make you very happy," The chubby rabbit coos seductively in your ear. "But only if you join us willingly."
You feel your rod get hard as you get a great view of her cleavage. You whimper, and yet, a strong desire to be with her seems to grow inside of you. You look up at her eyes, and nod. "Okay." You whisper.
She smiles. "Good choice. You won't regret it." She presses her lips to yours, and grasps your pants. She undresses your pants slowly, and then sits down on your stiff shaft. She bounces on it hard and fast, groaning and moaning.
You would love to massage her breasts, but your hands are tied, and so are forced to watch. But then, your arms and hands start to itch. You look down, and gasp. White fur is spreading all over them! Your fingers shrink and start to look more like digigrade paws than human hands, and the fur spreads up your arms, and up your chin, as well as down your chest. You feel it spread down your legs to your feet, which suddenly burst through your shoes and socks, growing incredibly long and narrow. Rabbit feet!
You feel your ears grow long and move to the top of your head. Finally, your nose and mouth fuse together and expand outward a bit, your nose turns pink, and starts to twitch and bounce up and down. Then, whiskers burst out of both sides. You're turning into an anthro rabbit!