— Dana —

I slid the apple between my teeth and took a delicious, juicy crunch. It was nearly time for COMP203. Slutface was in the class, as I'd discovered yesterday, I knew she would be walking up this staircase. She was too fucking predictable and easy. Hannah was talking about the social last night - how she'd managed to drink 3 shots of something, then 3 shots of prosecco... 3 shots of some other. I wasn't really paying attention. My apple was coming to an end and my next piece of prey was going to arrive. Hopefully that gorgeous little whore would be wearing a skirt and I could cop a quick feel of her.

She rounded the corner and I saw her jeans - instant disappointment. When is she just going to wear something I can grab again? I flicked my wrist towards Hannah to shut her up and waved the rest of them away. It was just me and my slut now. I was stood over her on the step, said hello and watched the colour drain from her face. I know how to get her. How to really delve into those deepest bits of her and get my grip.

I played with her a little, grabbed her cheeks and showed her how small she was. She stumbled backwards and I laughed, then stepped towards her. I moved off the step and kept teasing her, but then I saw she was holding herself tall today. I looked down so I could mock the heels she'd gone for - but there were none. Just flat trainers. The kind she always wears? I looked back up and realised she must be playing some sort of trick or had some freak growth spurt. I blurted something out about it and fucked off.

Fuck fuck fuck. What was happening to that dumb bitch? How dare she look down on me. I can always get her on her knees then she won't have a choice either way but to look up at my godly figure.

—Cassie—

I was finishing the assigned lab task, caught a moment of boredom and flicked back to my phone. I had a text from Ephie. She wanted to hang out later, which was fine with me. As I was typing back my phone reacted again - graphical glitches all over and the app re-appearing. The prompt had changed. “What more do you want from her?”. I pondered that for a moment. Had I really taken something from Dana? Had I grown? I wouldn’t have believed it were it not for the strange string of coincidences I’d experienced this morning. First, the tits. Now she looked smaller than me in the corridor. Plus, now I think about it I hit my head on the doorframe which I’ve always been smaller than. What do I want from her?

I thought on it. Tapped a few words. [I want more of her chest, height. I want her smarts and friends]. I clicked send. I was expecting to feel some kind of tingling or magic, maybe I really was in my head about it. The screen turned to a cartoon frown that changed, twisted and became an evil smirk, before glitching and returning to my messages from Ephie. I told her I’d meet her for dinner before the bus at around 5ish.

My gaze moved up from my phone and to the back of Dana’s head. A pencil moved to my lip and I chewed mind-numbingly on the end, wondering how long it would be until I could just suck those parts away from her as I’d laid out in my desires with the app. I felt a stretch on my hoodie, it was taut, unlike before where it held loose against me. I looked down my row and saw nobody else could see me behind the computers, so I moved a hand up to my stomach. I was feeling okay, I wasn’t bloated or anything, so I kept moving my hand up… there was a little more than a handful now. I could barely fit my hand around one breast, with no bra to keep it supported. I immediately felt a stiffening in my back as I rearranged to handle this new weight and centre of gravity. I collected a few things, closed my laptop and slid it into my backpack, if I changed much more here there wouldn’t be many clothes left to fit me.

As I jumped up and moved to the door, I saw Dana tilt her head and smirk at me. It wasn’t her usual snarky smile, it was almost like a genuine interest in me. It was strange, but I walked out the lab and ignored it as I headed to the bathroom.

I closed and locked the stall behind me, slipping my hoodie off. I forgot I didn’t wear anything underneath, so I looked down and saw two perky, large breasts staring back at me. I could hardly see my feet anymore for them. I noticed also I could almost see over the bathroom stall - having been a short 5ft2 girl before the day started I now easily stood around 5ft10. I took a moment and breathed.

— Dana —

The lab task was going well. I was ahead of everyone, which was the usual story in these sessions. My code was just better, my brain worked faster, plus I had my minions like Hannah to help me stay ahead. Lizzy from my other class asked if she could borrow my notes, I was happy to help, being a proud feminist and helping raise other women. Well - women that matter. I turned and I saw my slutty victim heading off out of the lab. I gave her a wry smile. She was looking beautiful, like a good piece of meat for me to get my teeth stuck into. I wondered where she might be heading off to though, given she never left class early. Had she finally had enough of me and was running to tell tales? No, surely not, it wasn’t her style. She wouldn’t. But the thought hung to me a little longer, after a minute or so I forced myself to stand up and find out where she had gone.

“Hannah, take notes for me”. She looked at me a little confused, but I had no time to waste, I had to find out where she had gone. I was careful as I walked towards the bathroom, opening the door and checking nobody was inside. I patted a few of the doors and opened them, checking each stall to see if someone was lurking and might hear me. I was about to push open the last stall when it flung out from under me and brought a gust rushing past my ears. Standing in front of me was a tall, curvy brunette, with a hell of a rack right in my eyeline. I was about to apologise for the intrusion when she spoke.

“What are you doing here?” she had demanded to know. I recognised her. Wait. It was Cassie.

“Dana, you’ve been rude to me. You’re going to pay the price.”

I gulped. She looked like she must be at least 6ft 4! I had at least 6 inches on her yesterday and now those had somehow shifted a foot in her favour. I took a step back and felt the cold porcelain on my leg, I had made sure nobody was in the room and now this - this freak! Was stood in front of me.

“You’ve been awful Dana. You’ve tormented me, ruined my life really. Now it’s time for me to do as I please with yours”.

I was almost full of rage at her attitude. “What, so you grow a few inches and you think you’re tough stuff Cas? Get real you freak. You’ll always just be my pet. Now get on the floor and clean my shoes before anyone sees you acting out”.

“Oh so it’s Cas now? What happened to slut?” she snapped back. Her bite had gotten a lot worse in a matter of hours. I began to turn to leave, but she grabbed my arm “Hey!” my outrage fell onto deaf ears as she yanked me into the stall and smacked her palm across my mouth. I could smell her perfume now that we were so close, a sweet raspberry song that tingled my senses. She pushed me up against the wall and locked the stall. I squirmed and tried to push her off, but she had strength and I was now at her whim. Her body moved closer to mine, pressing her thighs towards mine. I felt small up against her, with her breasts in my eyeline, intimidating me.

“It’s time you learned some manners, my good girl.”

I couldn’t help but feel a stirring as she pushed me and called me this name. I wanted to resist and call her disgusting but I was melting into it. I felt her hand brush my thigh, she lifted it with ease and before I knew it I was held against the wall with my legs in her arms. She forced herself tight to me to keep me up against the cold tiles. I could feel a heat rushing to my cheeks, right as her hand moved and groped my arse under my skirt. I opened my mouth to protest but I couldn’t find the words, I was willing her to carry on somewhere deep inside me, but my conscious mind wanted to stop what was happening. Her mouth moved towards me, gently brushing kisses up the side of my neck. I had no chance of stopping anything or bringing my voice out.

She moved to my cheek and I instinctively turned, her hands moved and she pushed my arms above my head. I was being pinned against the wall at all pressure points, my hands held together at the wrists. I moved my lips to meet hers and felt her push her tongue into my mouth. My back arched as I accepted her, not that I had much choice. My legs were no longer held against the wall, I moved them and locked them together behind her back, pulling her closer to me. Our kiss was getting intense and I could feel myself heating up as a dampness began to form against my panties. I almost let out a gasp when I heard the bathroom door, but she clasped my mouth shut before I could react. She leaned into my ear.

“Silence now my good girl”

She let my legs down but I couldn’t stay stood, I slid to the floor as she left the stall. I was trying to process what had happened, not even thinking about who had walked in and might see me on the floor. I took a deep breath and lifted myself up, walked to the bathroom mirror and noticed it. I was indeed shorter.