Surprise Boxes (Patreon)

Story by Sophiie93

I remember having a mutant teacher when I entered high school. She wasn't flashy at all, but she had four arms that she moved with ease. It’s not uncommon to see a mutant like that in Port Solei today but it was the first time I saw a mutant in real life, and I can’t deny it left a lasting impression on me.

I knew from then on, that the day I had a girlfriend she was going to be a mutant. Unlike most of my friends, I was much more attracted to their unique and different bodies. I was always curious about how they adapted day to day to live with their unique figures and in most cases taking advantage of it. They were all boxes full of surprises. Sexy and exciting surprises.

When I was nineteen, I was in a class that had three mutants in it. Rebecca wasn’t the most attractive of the three, but she had a great smile and made me laugh on a daily basis. She had blue hair, large breasts, and six fingers on each hand. We wound up doing a group project together, and I found myself fixating on how easily she moved her six fingers.

“Do my hands bother you?” she asked with a small sigh.

I waved my hands. “No, not at all! On the contrary, I think they are beautiful!” I said before I could stop myself.

Her eyes went wide as her cheeks turned red. “R-really? Is it because I have six fingers?” She raised her hands and wiggled her fingers in front of my face. “You are a very curious person, Richard. Do you have a thing for six-fingered hands or something?”

“Mutants in general,” I replied.

Rebecca smiled and touched a finger to her lips. “Then I have a surprise for you. But you have to keep it secret, ok?”

I nodded enthusiastically. “I promise!”

Rebecca pulled her sleeve up to her elbow and extended her arms. As she did, they split right up the center, dividing into two arms each with three fingered hands at the tips. She picked up her pencil and nimbly began to spin it. “Tadaaa!“ she said proudly.

“W-What the…? How can you shapeshift like that?” I said and nearly jumped up from my seat.

“Shh keep your voice down!” she said and immediately merged her four arms back into two. After it became clear that no one had heard them, she allowed her skin to turn blue and nearly transparent. It almost looked like she was made of liquid.

“You're a slime! Wait does that mean you can take any shape you want?”

"Indeed! Just as long as I have enough fluid. I admit today I am quite thirsty,” she sighed.

“So, you could be a humantaur with six arms if you wanted to? Why wouldn’t you do it all the time?"

“That sounds very similar to Kait, one of the other mutants in our class. Have you seen how difficult it is for her to sit in those tiny seats? Pass. A simpler body is easier to deal with plus I don’t have to get special made clothes.”

“If I were you, I’d have all the extra body parts possible,” I admitted. I couldn’t help noticing how there were small hints in her skin and even hair about her near-liquid consistency. Something about the way the light was bouncing off them.

“You'd resist if you knew how much fluid I needed for something like that,” she said with a chuckle. “In fact, I'm pretty thirsty right now. I don't want to go down to the store to buy something to drink.” Her eyes suddenly rose and locked with mine. “Do you have any liquid you can give me?"

My hands immediately went to my crotch. “Liquid? Me? N-no... here!? Do you want me to give it to you here?!”

Her eyes followed my hands and her face turned red. “WHAT THE HELL ARE YOU TALKING ABOUT, RICHARD?!” she threw her pencil at me. I rubbed my head as it ricocheted off. “I MEANT DO YOU HAVE A BOTTLE OF WATER!! IDIOT!"

I realized my stupidity as I retrieved a bottle of water from my backpack. “O-Oh… I'm sorry… it's just…”

“You're just a mutant-crazed guy who thinks with his penis, right?” she snatched the bottle from my hands and guzzled the water done.

“N-no! It’s just that sometimes my curiosity gets the better of me. Actually, does ‘that’ actually count as a liquid?" I asked her sheepishly.

She almost choking on the water. “Jeez… you don't have any filter, do you?” she wiped her lips with her hand while she looked away, cheeks beet red. She didn’t look at me as she answered. “I can't answer that… I don't know… I was never able to try it…”

I nodded. “I hope one day you can. Whoever gets to give you that will be so lucky. I mean. I’m sorry. I wasn’t thinking. I’ll stop.”

Rebecca rolled her eyes and sighed. “Let's just focus on studying, okay?” One of her hands played nervously with her hair and her eyes darted from her books to me several times.

“R-Rebecca…I…I’m so-“

“Do you want to walk me home after school?” she cut me off then averted her eyes. “I admit you’re not the only one who’s curious about…things…” My eyes snapped open as my mouth fell to the floor. “Oh, I see. You can say whatever you want but whenever I do you won’t answer?”

"Yes of course. I mean yes, I will! I’m sorry you just caught me off guard.”

“I'll see you in a few hours in the square across the street then. And… bring a lot of water,” she winked as she gathered up her books and headed off to her next class.

Later that evening we stepped into her apartment. The tension and nervousness between us was so palpable it might as well have been another person. I dropped my bag next to the couch with a thud. A dozen water bottles weren’t light.

“Wow, you sure know how to deliver,” Rebecca said as she grabbed a water bottle, unscrewed the lid, and downed the entire thing. She did the same with another. “Ahh refreshing…” she said as she dropped her coat next to my bag. Without waiting another moment, she kissed me and began guiding me back towards her room. We discarded our clothes along the way. The liquid consistency of her body left little droplets on my lips and skin. Honestly, it was hotter than I expected it to be.

Before I knew it, I was lying on her bed and she was climbing on top of me. Her body grew more transparent as I watched and two extra arms slurped out from her sides, each with six fingers just like her original hands. Rebecca arched her back as her arms grew, and just below her breasts another pair slowly emerged.

“This is what you like, right? Or do you want more arms? A humantaur perhaps?” she asked with a smile.

The more she changed the more transparent she became. My eyes scanned every inch of her body as my hands brushed over her thighs. “For now, you're perfect like this,” I said. Something in her belly caught my attention. Two bright red spheres seemed to be floating there. “Wait, what are those?”

“Oh, I'm sorry. I have a hard time maintaining my human appearance when I change shape a lot. Those spheres are… well, slime cores.”

“Oh! Like in fantasy stories? Is that your real body then?”

“Yeah, kind of. You could think of them that way,” she said.

“Wait, does that mean you have two bodies? How is that even possible?" I asked, stunned. My hands never left her body.

Her cheeks turned red even in the dark bedroom. “It's just that… you see… Rebecca is not my real name. It's just a nickname I like to use for us."

“Us? Are you a fusion?”

She nodded. “Rena and Becca… I used to be two individual girls, but our mutation fused us into a slime with two cores…”

“Wow! Wow wow wow! I’ve never seen anything like this before,” I said excitedly. I squirmed beneath her a bit, too excited to stay still, and my already hard penis slipped through her watery skin. “Wait… wait, so… both Rena and Becca are okay with this?”

Rebecca smiled at me, and both cores rubbed against my penis, moving up and down. Judging by the way Rebecca’s eyes rolled to the back of her head she was enjoying this just as much as I was. The cores felt very soft and almost spongy against my dick, almost like breasts. It was hard t keep from moaning and Rebecca hadn’t even moved her body yet.

“Does this answer your question?” she told me with a wicked smile, placing her four hands over me to begin sliding up and down on my dick. I couldn’t hold back the moans anymore. It all felt too good. “You know. If you cum on our cores, we’ll absorb everything you give us and grow a fresh new vagina for you to play with."

“God…” was the only thing I could say before I came hard inside Rebecca.

“Rena says that you are very tasty and that yes. Cum absolutely counts as fluid,” she said and climbed off me. She spread her legs so I could watch a third one grow between them. “See? It works way better than water too!"

“So… this new leg is made of my cum?” I asked her as I knelt on the bed.

"Ugh no, that's not how it works," she replied. "We turn any liquid into slime before using it as our body..."

“'We' sounds very strange when I only see one face. Can you have two heads?”

“As we told you before, the simple forms are way more convenient. But now that you know our secret maybe we should do it to talk to you individually.” Rebecca looked at her three legs and then added, “but we really like the three legs right now. Don't you want to give us more liquid for growing that extra head? And this time we are not referring to more water!”

Without a doubt, during the next few hours I made sure they had liquid for everything they wanted. By the time we ran out of energy, her body was a humantaur with ten arms and her front was covered in breasts, each orgasm involved Rebecca growing more and more parts. Although we fell asleep before they decided to grow a second head.

When I woke up the next morning, I was alone in Rebecca’s bed. I followed the voices I heard into the kitchen where I found Rebecca…or should I say Rena and Becca…sitting completely naked at the dining table. They had two heads, four arms, and four breasts. When they looked at me, I could see they were identical with identical smiles for me when I approached.

“Good morning sleepy head!”

“We made some breakfast for you!” They told me as I sat in the chair across from them.

I smiled. “Good morning. Uh, which one of you is Becca and which one is Rena?”

“If we tell you we will ruin the surprise. That's what you like about mutants after all, right?" the right head told me. I just smiled and took a bite of my toast.