Hesitantly, you say “Uh.... sure.” “Ok” She mumbles an incoherent sentence into a radio she’s holding. “The breeding cells are back down stairs.” Wait, you think. But all the lions are all males. How would that happen? She leads you down a hallway with a door at the end. She opens it to let you through, then abruptly shuts it behind you. You try opening it to no avail and as the lights brighten slightly you see two lions standing in front of you.
You notice that the eyes and mouth of one are... hollowed out? Then you notice the zipper on it and realize.
The lion costume quickly approaches you as you try to retreat but grips you tightly. It grabs your clothes and somehow rips them to shreds in seconds. You feel the warm fur of the costume envelope your arms and legs as it grabs your now hard six inch cock. You feel something go up your ass as the pelt reaches your face. In one last futile attempt you paw at the face but tendrils shoot out from the mask to pull it closer and it covers your face.
The real lion walks over and quickly overpowers you with his 6 foot, 200 lb muscular body. He starts furiously making out with you, your still human tongue touching his rough lion tongue. He goes behind you and reaches around you to stroke you barbed cock as you let out a moan of pleasure through the costume. You feel his hard cock rise and brush against your furry ass. He lets go of your cock and shoves two fingers in your tight asshole, expanding it, with his left arm still around you. You let out a soft “Oh fuck” as you feel his eight inch cock thrusting inside your ass. As he cums inside you ass you feel the rest of your changes. You grow from 5’7” to 6’2” as your cock grows into the costume’s nine inch cock. You gain 40 lbs of muscle and feel yourself expanding into the lion’s muzzle and tail. As you both cum, you let out a leonine roar, in a voice that is deeper than your old one.
Still horny, you overpower your new boyfriend with your new strength and proceed to bury your new cock into his ass. He lets out a surprised moan and lets you thrust until you both cum again. You make out again. Afterwards, you both roll over on the floor and fall asleep, tired.