It was a quiet afternoon at home, and two girls were playing cards at the table in the living room. One of these girls was Carla, always in her usual home pajamas and barefoot, with the disheveled hair of someone who had just woken up.

The other girl sitting at the table was a petite girl, dressed in dull-colored clothes, a long skirt reaching down to her feet, and an anonymous blouse; she wore circular glasses, and a long mane of hair gathered in a braid framed her face.

"H-How did the exam go this morning, Carla? From the enthusiasm with which you invited me here to play, I'd say well as usual" said the girl nervously, drawing a card from her deck and adding it to her hand.

"Passed with top marks! I'd say I worried for nothing!" replied Carla, stretching her arm in front of her and making the victory sign with two fingers. "And thanks for accepting with such short notice, Jane. There's nothing better than a good game of MTG after a week of intensive study" she continued, drawing from the deck after Jane signaled that she had finished her turn.

"Congratulations" replied Jane, with a relieved expression. "That exam claims many victims among students, but you haven't disappointed. At least half of the students in my year still have to take it, and most struggle to understand..."

"Sorry, Jane" Carla interrupted, "but I don't want to hear about university until the start of the new lectures. Now it's time for Magic and rest! But mostly rest. But now Magic!" she announced, showing Jane the card she had just played to emphasize her point.

"Fair enough" agreed Jane. The game continued accompanied by the relaxed chatter of the two girls, until Jane seemed to remember something and began to look around suspiciously. "By the way, I haven't seen your sister Sofia yet; were you able to study undisturbed despite your shenanigans?" she asked, blushing at the memory of the times she had been involved in the sisters' fights, resulting in her body being deformed in many ways.

"Funny that you ask right now" replied Carla with a mischievous smile "beacause my little sister is closer than you think" she said, indicating the card she had just played.

It was a creature card like all the others, contained in a dust-proof plastic sleeve, and the back was that of a normal Magic card; the front of the card showed in the image section the full figure of a magical girl in the style of Japanese anime, with a sailor-style outfit composed of a shirt that barely covered her enormous boobs and left the lower part of her belly exposed, and a very short skirt; a pair of boots completed the outfit, leaving her legs exposed.

The girl had an enthusiastic expression, with one arm brought to her face with two fingers making the V victory symbol, and the other arm stretched upward with a clenched fist, in a classic pose of magical girls, or idol's; her hair was styled with twin ponytails. Overall, she was really adorable.

The name of the creature on the card was "Sofia, Magical Girl" and the rest of the card consisted of her typical Magic text and parameters; among all of them, the type of creature stood out, labeled "Flattened Sister".

Jane took the card from the table, removed it from the plastic sleeve, and tried to touch it: although with difficulty, it could be perceived that the image of the magical girl was raised compared to the rest of the card, as if it were a separate piece glued on later.

"S-She's not really..." said Jane astonished, looking at Carla, who was displaying a toothy smile. "Yes, it's my little sister! Isn't she adorable? I always wanted to dress her up as a magical girl, but she always refused, so I thought of doing it myself!" Carla took the card from Jane's hands and began to admire it with sparkling eyes. "It turned out really well, if I may say so myself".

"But how did you..." Jane began, but Carla immediately cut her off with a flurry of words. "At first, I made some origami with her body, but then I realized the possibility of combining the creation of a custom card with the concept of a magical girl! First, I removed all her clothes, then I spent a lot of time shaping her body to make it smaller and fit into a playing card, I adjusted her expression, put her in pose, and painstakingly painted her" Carla explained, mimicking each step of the process. "A few passes in the steam press, and she was ready to be glued to the custom card I had prepared earlier! It was a lot of work, but it was really worth it!"

"Now I understand how you managed to study in peace for the exam" Jane reflected, avoiding to emphasize how all the time spent on the endeavor had still been taken away from studying; but after all, she had still passed with flying colors, so who was she to judge?

"Actually" replied Carla, placing the card with her sister's squished body on the table and returning to the game, "we had made a non-flattening agreement (NFA, for short) for important events like exams and job interviews, but she broke it (or tried to) twice, so I had to keep her contained until now."

"Now I should let her go, but how can I when she's so CUTE in this state?" Carla sighed, with adoring eyes.

"Rather" replied Jane with a much serious tone, with her glasses made opaque by the light's reflection, fixing their position with her hand "don't you think you've overdone it a bit with the balance of 'Sofia, Magical Girl'? Custom cards are fine, but it seems to me that she's definitely too strong for her cost."

Jane's inquisitive gaze pierced Carla, who went on the defensive. "B-But she's so cute that she has to be really strong..." Carla tried to argue, but Jane continued: "And it's not even the most serious problem, haven't you noticed that combined with..."

The discussion continued during the game for a few minutes, and neither of the two girls noticed that the card "Sofia, Magical Girl", left out of the plastic sleeve, had started to vibrate more and more intensely.

Suddenly POP, Sofia's flattened body suddenly returned to normal, and she found herself propelled upwards, about half a meter high from the table: for a moment time seemed to slow down, the two girls sitting at the table looking with surprised faces at the naked and painted body of the girl who had just appeared above them, and that girl changing her expression from the enthusiastic one she had been stuck in to one of furious anger.

That moment lasted only a moment, though, because Sofia wasted no time and used her fall downward to grab the heads of the two girls with each of her hands, and SQUISH! she crushed both of them onto the chairs they were sitting on.

When Sofia touched the ground with her bare feet, on the chairs were no longer sitting two girls, but two discs showing the top of their heads, with two pairs of legs attached that had started to kick frantically.

"Wah, finally free! But how much time has passed? You're going to pay for this, Carla!" Sofia said, pouncing on her sister's body and expertly pinning her legs, before joining them to the rest of Carla's disc-shaped body with another loud SQUISH!.

Now in Sofia's hands was the body of Carla entirely reduced to a disc, which showed the top of the girl's head (she hadn't managed to raise her head in time) and some details of the rest of the body on the outline of the disc, such as the arms locked at her hips: the back of the disc showed the just squished legs, with the bare soles of the feet clearly visible, and the rest of the body, including the ass, outlining the center.

"Here we go, handled" she said, placing her sister on the table and placing a vase on top to prevent her from returning to normal. Sofia turned her gaze to Jane, who had managed to place her legs on the ground and was slowly and hesitantly heading towards the door, a pair of legs that abruptly ended with a disc containing the rest of the girl's compressed body.

"Sorry, Jane, but now you're involved too" said Sofia, easily grabbing Jane's legs and subjecting her to the same fate as Carla. A few seconds later, Sofia had in her hands the two disc-shaped bodies of the two older girls.

After the scuffle, Sofia took a moment to check on her body: she had a double twintails hairstyle and was completely naked, but on her body were the clothes of the magical girl painted by Carla, as if it were body painting: at a glance, one could think that she really wore those clothes if looked at from the front.

However, the painting only stopped in the front part of Sofia's body, so from behind she was naked without any painting or cover whatsoever.

Sofia blushed suddenly. "This is the most EMBARRASSING thing you've ever done to me!!" she railed against Carla, on the verge of crying from embarrassment, while Carla's compressed body emitted a murmur that could resemble a laugh.

"I need to take a shower right away to get rid of this damn paint, and who knows how many messages I've missed these days!" she said, looking for her phone around.

"Let's see what I can do with you two nerds in the meantime..." Sofia added, looking around for ideas, until her gaze fell on the kitchen utensil shelf, among which stood out a massive rolling pin.

"Found it" the magical girl chuckled, heading to the kitchen with the bodies of the two girls, who apparently wouldn't remain in that form for much longer.

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Sofia entered the main room of the gym, stretching, wearing her workout clothes - a pair of black shorts, a sports bra containing her ample bosom, a colorful towel around her neck, and a pair of purple sneakers.

The paint marks had completely disappeared, and her hair was tied back with a hairband in preparation for physical activity.

"A nice workout at the gym is just what I need after being stuck in that state for days" she said, finishing her stretch and sighing deeply. In the uncertainty and chaos of the world, physical activity and exertion had the power to relax her like nothing else.

"Hey Sofia, it's been a while, you didn't respond to my messages" said a girl, approaching Sofia.

She too was dressed in sportswear, but unlike Sofia, she was much taller and more muscular, with well-defined arm and leg muscles, her not-too-long hair held back by a headband on her forehead; she still maintained a slim and athletic physique, but it was evident at first glance that this girl was a regular gym-goer.

"Hi Mia" replied Sofia, shaking the girl's outstretched hand in greeting "sorry, but I've been... unavailable for a couple of days, and I still need to catch up on the messages I missed in the meantime." "Back to your sisterly shenanigans again, huh?" guessed Mia, crossing her arms with a playful expression on her face.

"Yeah, but now that she's done with her exam, I can get my revenge as much as I want" Sofia announced proudly, indicating the colorful towel around her neck.

At first glance, it might seem like a towel with an abstract decoration, but upon closer inspection, Mia noticed that the towel was formed by the intertwined bodies of two girls, one wearing shoes, a skirt, a blouse, and glasses (which miraculously were still intact and well attached to her body), the second barefoot wearing gray pajamas.

Their bodies were intertwined, as if they were the two colors that make up a candy cane; the twisting went on from their feet to their heads, which were shown in profile, their mouths attached to form an involuntary kiss.

The towel was rectangular and only a few centimeters thick at most, so the bodies of the two girls had taken strange proportions due to the twisting and squashing.

"Wow, nice work!" admired Mia, feeling the towel and examining in particular the faces of the two girls, which showed a confused and deeply uncomfortable expression; the back side of the towel was similar to the front side, showing the other profile of the two flattened girls.

"Thanks" replied Sofia, "I had to lock them up like this otherwise Carla would have gotten free right away, but this way even she will take at least a day to return to normal."

"And who would this other girl be? Wait, don't tell me... Jane?" said Mia, her expression becoming resigned. "How is it that you always get involved in the shenanigans of these two crazy systers?" the girl asked the bespectacled half of the towel, who could only respond with a defeated expression through her glasses.

"I'll leave you now" said Sofia, walking away from Mia, "I have a lot to catch up on after all that time being stuck, and the girls here have a lot of sweat to dry" she added, with a mischievous expression on her face.

"Sure, enjoy your workout!" replied Mia, before turning around and returning to her training.

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After about an hour, Mia finished her workout and, as she was leaving, she saw Sofia running on the treadmill, her towel composed of Carla and Jane around her neck, which she occasionally used to wipe away the sweat from her run.

A mischievous grin appeared on Mia's face; casually, she approached Sofia's treadmill and with her finger pointed to a spot on the opposite side of the room.

Sofia, without stopping her run, glanced in that direction, and Mia took advantage of her distraction to increase the treadmill's speed to the maximum. "What's over th.. Woah!" exclaimed Sofia as the sudden increase in speed caused her to lose her balance and fall flat on the treadmill.

However, the treadmill continued to move at full speed, inexorably dragging Sofia's body (and her towel) along with it, until she was sucked under the rollers with a loud SQUISH!, only to reappear immediately afterward on the upper side.

Sofia had been flattened on the treadmill face down, with her hands and feet stretched upward vertically; her boobs, due to the compression, had increased in size and were visible despite her being face down.

However, Sofia remained visible for a short time, as she was once again victimized by the rollers due to the continuous rotation.

The scene repeated several times under Mia's amused gaze, with each SQUISH marking Sofia's flattening becoming less and less noisy, until the treadmill returned to rotating without making any noise, indicating that Sofia's thickness had been reduced to less than the space between the treadmill and the rollers.

At that point, Mia turned off the treadmill, waited until it stopped completely, and admired the result.

Sofia's body had taken on the width of the treadmill, and it was now shaped exactly like a rectangle, with the currently visible side colored in stripes: first, the purple of the shoes, then the pink of the legs, the black of the shorts, again the pink of the stomach, the black of the sports bra (with a strip of color visible, probably the towel - or rather, the two girls - that Sofia wore around her neck), and finally Sofia's hair.

Mia grabbed the upper part of the flattened body and detached it from the treadmill, holding it in her hand by the head: the front part of Sofia's body was divided into sections like the back, with some differences: at chest level, Sofia's enormous boobs perfectly divided the width of the rectangular shape in two, and there was no sign of the towel, which had probably been crushed between the two huge expanding melons.

Finally, Sofia's face displayed a surprised and uncomfortable expression, but she quickly recovered and began to protest with Mia: "Come on, I had JUST freed myself from my sister after days of being squashed. Is this the right time for these jokes?"

"Funny that you should say that, after you squished me into a disk last week and used me as a weight in the barbell" Mia replied with a decidedly amused expression, pulling and distorting Sofia's malleable face.

"Plus, you conveniently 'forgot' me there, and I was used as a weight all afternoon." Despite the muscled girl's words, there was a huge smile on her face.

"Oh.. right.. Well, I guess we're even now, right? Could you please let me g.. Mpfff" Sofia began, but in response, Mia started rolling her up like a scroll until all that was left in her hand was a roll with the purple colors of Sofia's shoes and the pink of her flattened legs.

"Sorry, girls, but the temptation is too great not to have a little fun" she said smiling, and she left the gym with the three trapped and deformed girls under her arm.