Three hours later...

You groan, and lift your head. You push your body off the hard-plastic floor and look around. You seem to be in a test chamber of sorts, about the size of a medium sized room. To your left is a large observation window. Alex, is sitting down on a chair with her clipboard in hand. You should feel a swelling surge or rage right now, but for some reason, you feel rather calm.

"Hello May..." Alex rings in over the intercom. "You may be wondering where you are. You might also be wondering why you're feeling so calm right now."

"Yes." You thought to yourself. "I am wondering that."

"Well, the reason is a bit complicated, but we'll demonstrate it in a minute. You see... I've increased the level and intensity of chemicals in your body, specifically those relating to sexual desire. I've also transformed key parts of your brain in order to increase your attraction to humanoids of the same sex. But, you could simply say I boosted your sexual desire, or libido, for short. You see, most humans have a libido factor of around 1. Some have a libido factor of 0.9 or 1.2, but I've never seen it go past 1.4. For normal human transformations, I increase the libido factor to 1.3. Fairly horny, but not so much that they'll start to be completely unreasonable..."

As you listen to Alex give her explanation, you start to space out a little bit. You hear what she's saying, but with ever passing moment, you care less and less. You look down at your chest. So round... So bouncy... So smooth and perfect...

"...However, as you might have noticed, for most experiments, I go beyond that point. Some experiments such as harpies, don't get libido boost. Futanari get a boost up to 2. These chicks are so horny that they'll literally start raping someone withing a minute of seeing them. Even after sex, they're only on cooldown for an hour at most."

You've completely stopped listening to Alex. You're too busy fondling your own breasts.

"However, you, May, are an Unlit dungeon monster. You have a libido factor of 4. You don't stop to think. You don't ask questions. The only things you won't touch are other monsters, and myself. Simple sex alone isn't enough to satisfy you, and so you've been equipped with some... Special features. They're instinctual, but I need to make sure you can use them... And that's why I brought in an old friend..."

A hatch opens at the end of a room, and out rolls a familiar face. It's Zelda. She seems to have been pushed into the chamber by a couple yellow-haired women. She stumbles to the floor, swearing and flailing.

"Get your stinking hands off me your shitbrained, yellow-haired... May?" She asks questioningly upon seeing your face. "May, it IS you!" Zelda cries out and runs up to you. Her titties flop around like fresh fish on a dock... Her wonderful hair flies through the air like golden thread... Her pale, smooth skin is practically radiating with beauty...

"I must have her..." You think to yourself. "You will become... A part of me..."

Zelda wraps her arms around your back and hugs you. Only then does she notice her mistake.

"Wait..." She asks, looking up at you. "Why... Why are you so big?!" You only grinned as you jutted your ass out, carrying Zelda along with it. She tries letting go, but finds that the skin of her arms and breasts have already merged with your own.

"Wait, what the fuck?! May! MAY!" Zelda desperately tries to rip the arms off of your butt, but her flesh only sinks further into your body like clay. You feel her hands melt into your butt, causing a wonderful tingling sensation as her flesh becomes your fat. Outside of the testing chamber, Alex chuckles.

"Yes, Zelda... I'm afraid your dear friend May is now nothing but a monster. She still remembers you of course, but she's too horny to care..."

Zelda starts seriously panicking.

"May! May, please! Don't do this, I'm your friend!"

You don't even care. If you had been listening to Alex, you would have agreed with her. You didn't care what Zelda wanted. The pleasure felt too good. You wanted her as part of your ass. You needed to be rounder. Bouncier. More and more sexual...

"OohhhhoooooOOOOOOhhhh!" You moan long and loud. You reach your hands around and shove Zelda's face into your rear. It immediately sticks and Zelda is silenced forever. All she can do now is speak muffled, quiet words that no one can understand. You can feel her salty tears run down your mess of an ass as you pull her in. Your backside looks like a pile of silly putty, Zelda's arms are completely gone now, and only the back of her torso and head remains. You give another moan. The tingling sensation in your rear feels GREAT! It's like every cell in your butt is cumming. You bend your body forwards and begin to finger yourself as the last of Zelda's body becomes yours.

Zelda kicks her legs, the last remaining part of her body, frantically and without any strategy. Your butt starts to round out. It's noticeably bigger now, having absorbed almost an entire person.

Slowly, the tingling sensation comes to a close as zelda's petite feet SCHLOOP into your rear end. You give your self a hearty slap on the butt, and your ass vibrates and jiggles like a base drum. Some of Zelda's body has even gone to your hips and your thighs, giving you lovely curves.

You giggle, and sit down on the floor, still fingering yourself, hot, sticky juices flowing from your crotch.

Suddenly, a voice comes on in your head. It's Zelda.

"Please... Please, don't sit on me... I feel it... I feel EVERYTHING... Why, May... Why did you do this... Why did you turn me into your ass?"

You're little shocked. For a spit second, you even feel a bit guilty. But then lust gets the better of you and you return to your primal, horny self. It appears as though Zelda's brain and skull were not digestible. And since her body was now yours, she was using your vital systems to live. However, you had complete control over her. You could even read her mind, if you wanted, shut her up, for as long as you desired.

For now though, you decided to let her complain about her new life as an ass. There was something sexy about hearing the distress of a girl who's new job it was to cushion your body and shit out your food. You spanked her again, and savored her mental screams of agony. Not from pain, but from humiliation.

You spanked your butt again, bounced on the floor, and spread your ass cheeks apart and presented them to Alex. Zelda was mortified, but Alex just raised her eyebrows and smirked.

Twelve hours later, you were transported into the Unlit Dungeon. An enormous series of unused rooms below the laboratory. There you met with other monsters, and more importantly, other girls to prey upon. You absorbed two cute redheads into your breasts, [Starfire, Teen Titans & Ranma, Ranma 1/2] and another [Skyla, Pokemon] into your quivering cunt. You chuckled and moaned as she got sucked in between your legs, her mouth changing into your vagina, and her fiery red hair becoming your patch of pubic hair.

As soon as she stopped moving, you stuck your fingers into your new pussy, and fingered yourself to the lovely sound of her screams. Your boobies sobbed as they jiggled about, and your ass continued to berate you as she was pressed against the hard tile floor.

You didn't even bother calling her Zelda. Her name was now "Ass", because that's all she was. Two lumps of fat and a rectum, only good for sitting and shitting.

"How can you do this, May?! Don't you have a soul?!"

"Bitch, I'm not even close to done..." You respond. "You're looking a bit skinny compared to my new boobs... I think it's about time you had some company..."

[ABSORPTION PRED ENDING ACHIEVED]