"...I'll give you some time to choose."
Betty, still in her pantherine suit, leaves you in the costume room. Still not completely sure, you start browsing the costumes. You slide the costumes along the racks they hang from, until your eyes fall onto a golden suit hanging from a small coat hanger. You take the lion costume off of the rack and take it to the changing room you remember seeing Betty go into. You stand in front of the mirror, holding the suit in front of your body. You nod to yourself, and move to lock the door and try the lion suit.
You slide out of your shorts, then shirt, then boxers in preparation to put on the costume. You sit down, jumping a bit at feeling your bare ass touch the cold, hard plastic of the changing room bench. You unzip the costume's back and slide your legs in the digitigrade legs of the costume, and feel your dick still touching cool air due to the costume's sheath. You pull the costume's torso up to yours and slide your hands into the lion's claws. You grab the head of the costume, which is attached to the suit, and slide it over your head. Finally, you reach behind your back to pull up the zipper of the costume.
As you are about to walk back out, you look into the mirror and take the time to admire your costume. The costume's body fur is a slightly dirty tan, with its texture being the perfect mix of rugged and soft. The long lion tail helps you balance on the digitigrade lion legs. The paw-hands have amazing dexterity and nice white claws. The costume itself fits tightly around your body, but enhances the way you look, giving you a slightly more athletic frame that is still realistic. But the mask is the highlight. The deep brown mane flows down to your upper chest and the feline face is both leonine and masculine.
You then look down at your crotch and remember that you should probably put on your boxers over the suit before heading out of the changing room.
You step out of the costume room, where Betty greets you.
"I called up the lion in room 826 and told him you're coming."
"I-"
She only has to smirk at you to cut you off. You return the sly smirk and walk out of the room to the elevators.
You walk up to the door, feeling confident in your lion skin, glancing to the right to confirm: "826," and knock lightly, finding that the door is ajar. You walk into the dimly lit room and find a hunk of lion lying on the room's bed. He nods at you. "What's up?" You smile beneath the mask, and look down at his crotch. "Heh. Not much besides your cock." The lion stands up and approaches you. He has a similar stature but is much taller. He stops right in front of you, then reaches behind you to close and lock the door. The lion reaches out his left hand to caress your face, then pulls you in closer to him in a kiss. In the back of your mind you feel something off about his mouth, as if his tongue is too long and his teeth are too sharp. You think nothing of it though, and return his kiss, letting the lion caress your mane. You both feel your cocks touch inside your boxers. The lion reaches down to rip the boxers off of your ass and off of his ass as well, exposing your erect cocks. "Fuck yeah... lemme suck that cock..." you whisper, as you kneel down to suck on the lion's red cock. You open your mouth, which opens the suit's muzzle, and allow the huge cock to enter your mouth. You feel it almost reach your throat as the huge lion makes you pleasure him. You hear the lion grunt and moan in pleasure, which only makes you harder. The lion puts his hands on your head and pulls it close to his crotch as you feel him blast his cum into your mouth. You cough and choke on his cum as he withdraws his cock. You stand up and bend over the bed. "Assfuck me," you command the lion. You feel two rough hands spread your ass apart, exposing your human asshole under the lion costume. You grunt in pleasure at feeling the lion's cock enter your ass slowly, loosening your asshole. He pulls it out slowly. He shoves it in more forcefully, and you reach for your own cock to stroke it. He begins to fuck you more quickly, and you grunt every time his cock hits your prostate. You finally feel him slow down a bit as he prepares to release his cum into your ass. As soon as you feel his cum flow into your asshole, you feel tingling throughout your body. Your body expands into the muscular structure of the lion costume you wear. You feel your skull expand into the leonine snout of the mask. You feel a new part of your body emerge as your tail bone expands to fill your new leonine tail. Your cock grows a few inches, and turns red and more leonine. Your face is full of exhaustion and your chest heaves as you pant heavily and finally cum all over the floor.
As you pant more slowly and sit up, you begin to realize what happened. You, still panting with a surprised look on your face, examine your hands, then run your hand along the fur on your chest. Upon realizing that you can feel it, you reach up to your face and pull on your snout. You turn to the lion that just fucked you, and finally realize that it's not a guy in a costume.
"I-... you-"
He puts a hand (paw?) on your shoulder.
"It's okay. It wears out after a few hours." He smiles at you.
"But-"
He puts a finger to your lips. "We still have the rest of the day and the entire night to ourselves..." He caresses your mane again, and suddenly pulls you into another kiss. You, surprised, slowly calm down and reciprocate. You both fall back onto the bed. You caress his mane, returning his favor. Suddenly, he pulls away, and presents you his ass. "Show me you using that new cock of yours." He taunts. You smirk and approach him, your leonine cock already hard. You slowly slide your cock into his asshole and hear him grunt lightly in pleasure. You pull it back and shove it back in. He grunts more loudly. You begin to slide your cock more quickly in and out of his asshole, as he moans in pleasure. He starts thrusting his ass backwards and forwards in rhythm with your thrusting, making you go deeper into his asshole, until you finally feel your cum burst out of your cock and into his ass.
You slowly open your eyes, having spent the night at the room with the other lion. You feel something off, and examine your head to discover that it is a mask again. You jump out of bed, excited that the lion is correct and that everything is normal again.