Mistress then reached into her desk and began going through it. I could hear her pushing things to the side until she grabbed what she was looking for and set it upon the desk. It was a bunny tail butt plug that was about two inches thick with a tube of lube. My jaw dropped a bit as examined it, wondering how it was going to fit inside me.
"Bend over the desk." She commanded, gesturing towards the students desk that was directly in front of hers.
My cheeks darkened as I protested, "Bu-But, Mistress, that's not going to fit inside me and-" She had cut me off by stepping closer to me, hands on her hips as she made direct eye contact with me.
"Are you defying me?"
The look she gave me had my body tremble with cold chills. I shook my head no and hesitantly turned towards the desk, bending over it slowly before hiking my skirt up over my ass completely and spreading my ass cheeks for her. I heard her grab the toy and the lube, kneeling down to the level of my tight little asshole.
She grazed a finger against the tight little knot before getting in close to it and using the tip of her tongue against it. It caused my breath to hitch in the back of my throat while I jumped a bit, this sensation being unusual to me. Mistress chuckled a bit from my reaction before she backed off and grabbed the lube, spreading some on her fingers and rubbing it up against my asshole before shoving her finger inside me. I winced a bit from it hurting then becoming uncomfortable. I shifted around and that caused her to spank me.
"Move one more time and I won't hesitate to shove it all inside you at once." Her voice was serious, causing me to tremble in fear and from it turning me on from how forceful she was being.
"Yes, Mistress."
After working my ass for a bit, it began to feel fantastic, I was panting while my pussy was drooling. I then felt her work the tail inside me, slowly sliding it inside, again, hurting a bit but I made sure to stay still. Tears pricked my eyes from how unprepared I was for something so big. Once it was in completely, she stood up, grabbing me by the hair and pressing me against her body. She then moved her hand to grasp around my neck, choking me a bit as she jerked my shirt up above my breasts, grabbing one of my erect nipples and rubbing it in between her fingers.
"You'll wear that at the end of class every day from now on, got it? And if you upset me," She leaned in close, whispering into my ear, "I'll expose you to the entire class. Then they'll see what a true whore looks like."
I gasped for air, nodding my head as best as I could to show I was still submitting to her. She then released me, walking towards her desk and gathering her things. "You may leave but first," She smirked at me and grabbed her bag, rummaging through it before taking out a small piece of paper with numbers on it. "Send me some sexy photos when you get home. Anytime I request them, you send them."
"Yes, Mistress." I took the note from her, after pulling my shirt back down, and turned towards my bag, getting out my phone. I copied the number down into my contacts before throwing the paper inside my bag as well.
Once I left the school and began my walk home, my skirt kept hiking up above the cute little bunny tail, exposing my ass to anyone walking behind me. It got to the point where I was holding down the back end of my skirt until a breeze picked up and pulled the front part up, exposing my locked up cock. My face turned a pink shade as I started walking home faster, holding the front end with one hand while I used the one holding my bag to cover up my rear.
When I had finally reached the doorsteps to my apartment, I rummaged through my bag, desperately trying to find my keys from the excitement of walking home. I was ecstatic to start playing with myself for mistress.
'Maybe if the pictures are good enough, she'll take off the cock cage!' I thought to myself as I found my keys, ripping them from my bag as I quickly let myself in. I locked the door behind me and shot her a text, letting her know I was home and to be expecting pictures soon. She responded with, 'I need 3 of them.'
I gave a puzzled look, expecting her to say more, but also not complaining. I walked to my room and stripped my clothes off, not that I was wearing much to begin with. I propped my phone up and set it on a timer.
I stood in the middle with my ass facing the camera, my hands spreading my ass once again, letting her get a good view of the tail inside of me. The flash soon went off and I then got into a new pose.
I was on my knees with my legs spread, facing the camera. I pinched my nipples and pulled up on them, rolling them in between my fingers while I panted gently. I moved a hand down to my pussy and started fondling with my lips before shoving two inside of myself. The flash went off again, but this time I continued playing with myself. The pleasure feeling too extravagant to stop. I bit my lip and looked down at my sad and trapped cock, whimpering a bit. It wasn't long before the camera flashed again, getting me out of my trance.
I got up and turned the timer off, looking through the collection of nudes I had taken, feeling good about all of them.
I sent her the nudes and waited till my phone went off, her response being, "The photos were nice, edge yourself for tomorrow."
I gulped after reading the message, whining a bit while I sat the phone down and lets my hands wander my body. "That's not fair, she knows I can't cum. Why is she making this so hard?"
Running my hands passed my breasts, remembering what the nurse had given me today, I looked down at my breasts, not noticing much of a difference anymore. "Maybe it's just a placebo effect? Maybe they weren't any bigger earlier either…?" I grabbed onto them, feeling them up before going back to my nipples. I ran my fingers over them lightly, going in circles. My body growing hot again I hesitantly reached behind me and nudged my bunny tail around. The feeling was odd but I soon became accustomed to it.
On my way to nurse's office, I was lethargic and filled with sexual desire. I had stayed up until late that night playing with myself and when I had woke up this morning I felt a weight difference on my chest. Upon further inspection, my breasts had not only grown in cup size but my nipples became slightly bigger with increased sensitivity.
Placing my hand on the handle, I peeked through the window and saw her sitting at her desk writing something down, probably doing her paperwork. When I had tried opening the door, it was locked. Jiggling the door handle a couple times and peeking through again, she got up from her desk and opened it to allow me in.
"Good morning, Nekozawa. I see the serum worked." She locked the door then turned towards me, leaning against it and eyeing me down. My cheeks flushed a bit, she then pushed off the door and sauntered over towards me, taking my shirt and guiding me into one of the beds like she had done yesterday.
"We shouldn't have any disturbances for a while, I talked to Tama, letting her know I'd have you today so she wouldn't be out of the loop. Unlike how I was." Pushing me onto the firm mattress, she tossed her hair to the side, leaning in inches away from my ear. "You didn't tell me she's been having at your body for days now. What's with that?" She then leaned back and looked at me with a pout. Her cute light pink lip pushed out as she looked at me with doll eyes.
My face flushed red from her finding out so soon. My heart also slightly sank, all I wanted was my key back and now I'm further from getting to it. "I-It's not- I mean, it is, but I can explain why!" She pushed me back onto the bed and straddled me.
"There's no need to explain, I already know." She started unbuttoning her uniform, exposing her cleavage. "You said you didn't want to have to leave class to get off all the time yet you were up on the roof playing with yourself. If you wanted so bad you should have come to me sooner." She was then finished with unbuttoning her uniform and stripped it off. She was straddling me in nothing but her stockings and undergarments. "However, I'm a little nicer than Tama Sensei, I still have the key, all you have to do is beg for it." She then hopped up off of me and retrieved the same trey from yesterday, getting the serum prepared.
"While I'm satisfied with the size you've grown to, I'd like to see them bigger, especially your nipples." She stepped over towards me, squirting a drop out to make sure there was flow. "I want them so big your shirt shows every detail of them. Plus, imagine how cute you'd be with your nipples poking through in the middle of class. What do you think?" Before I could respond, she lifted my shirt up and started wiping my nipples down before pushing the syringes through, emptying them out inside of me.
"Besides, you'd like a little doll having breasts the size of mine, maybe even bigger!" While she cleaned up her equipment, I sat up on the mattress, massaging my breasts from how they ached from the shots. The feeling soon passing and arousal coming into play. I remembered the eventful night I had and became turned on just as before. With my fingers grazing over my nipples I shuddered, the sensation more intense than usual.
"Kagamine sensei please toy with me." I licked my lips and faced my body towards her. I nibbled on my lip and watched her movements as she disposed of everything. Her panties exposed her cheeks, giving me the view I had wanted in the first place.
Smirking, she turned towards me, placing her hand on her hip while the other caressed her midsection. Her heels clicking against the tile it wasn't long until she stood in front of me. Placing a finger on my jawline and dragging it slowly up to my chin sent chills through my body. "Oh? And why should I do that? Tama got you first and you didn't even bother to tell me about that. I think you deserve to be punished."
My cock was pulsating, trying to become hard through the small trap. The words she spoke making my body immediately hot. I nodded my head, "Anything for you Sensei. Abuse me until you see fit."
A wicked smile crossed her lips, "Take off your shirt and your shoes." She stepped back, her hand still resting on her hip as she watched my every movement. Her eyes grazing over my body like it was the only thing she could ever pay attention to.
Removing my shirt and tossing it onto the nearby chair, I sat on the bed to where my feet were hanging off. I pulled my shoes off and placed them under the mattress. Pulling up my knee high socks and straightening them out, wanting to look my best for her.
"I'll be back." She winked at me as I watched her make her way to the closet, it wasn't long before she pulled out a bag and a plain white shirt. She tossed it to me, "Put this on so I can start, my little slut."
As I followed instructions I could hear her walking away from me. After I popped the shirt on over my head, I realized how small it was. I looked up to see her standing in front of me, holding her hands behind her back. I rolled the rest down passed my breasts as best as possible. It was skin tight, my breasts were squished against my chest while it hugged every curve I had to offer. It was quite clear it didn't fit.
She stood still for a moment and ran her eyes over my body while licking her lips. She then leaned towards me and removed her hands from behind her. A pair of scissors were in her hands and started cutting holes in my shirt where my areolas were. It wasn't long before both my nipples were exposed. My face turned a bright red color, not expecting this from her. She tossed the scissors into the bag.
"Go grab the toy Tama gave you yesterday." The inside of my thighs were burning, my pussy had to be soaking the sheets by now. I hopped up and went to my book bag, opening it up and grabbing the bunny tail. I handed it to her and rubbed my thighs together.
"Please hurry, Sensei. I want you to tease me."
"Well, it looks like anticipation is working wonders on you too, is it not?" She giggled a bit before getting serious, "Now bend over."
I complied and bent over the bed, my ass facing her. She lifted my skirt up a bit and I listened to her making gentle sucking noises, getting the toy lubed up. What caught me by surprise was when she had spread my ass cheeks apart and started swirling her tongue around my knot. I gasped from the sensation. Feeling her pull away made me groan weakly, wanting more.
Once she worked the tail in, it had gone a lot smoother than yesterday. It felt more pleasurable when she did it.
"Ah, how cute. Is your ass not so tight anymore?" She leaned forward and grabbed a handful of my hair, pulling me up and forcing me to stand up straight.
"N-No, Sensei. l-It's not." My cheeks flushed again.
"I want to hear you say it. Tell me your ass is so stretched out, it took that butt plug like it was nothing." She held onto my hair tighter, pressing her body against mine and tilting my head so she was able to look me in the face.
"My-My ass is so stretched out that it took that butt plug like it was nothing."
"Louder."
Going back and forth a couple more times, I finally said it loud enough to where any passerbyers could have heard me. My face was vibrant red. She then pushed me onto the bed and forced me to face upwards.
"Good girl," She cooed, "I have a great day planned out for you." She dug through the back and took out a few pairs of handcuffs. "Your Mistress told me I could use anything in this bag on you so that's exactly what I intend to do."
