Published: Feb 20, 2024

My one-hundred and first caption, this time featuring a fun, if mostly unseen, situation.

Often used as a test subject by their brother, Yokota, the youngest brother of the household is rendered invisible and, unexpectedly, transformed into a woman as well. Lacking any sympathy from his brother, the youngest sibling is forced to enlist the help of his older sister to cope with this new form.

All image credits go to 阿岚罐头-ALAN. I do not own any rights to the image used. Please support the artist!

All image credits go to their respective artists. I have and never will claim ownership over any image I've used or modified for a caption, and I always encourage you to check out the artist and their wider body of work when possible.

“What do you mean ”a minor mistake”, you asshole? This isn’t minor!” I exclaimed, grabbing my brother by his collar with my now-invisible hands, pushing him against the wall.

Yokota, by brother, was a world-class chemist, one who had gotten accepted early into college thanks to his innate talents. Unfortunately, he also had very little respect for my privacy and, frankly, rights as a human being, having used me as a test subject for many of this stupid formulas. He never seemed to care about how they affected me at all, and this was just the latest insult. He had spiked my body wash, causing me to turn invisible in the shower. It wasn’t until I felt two breasts that I opened my eyes, seeing suds sliding off invisible tits.

“Well, its obvious I messed up something with the formula…” He absent-mindedly remarked, seemingly unfazed by my threatening posture. “I’ll have to fix it after our little chat here.”

“Fix it? Fix ME!” I yelled in my new voice, shaking him as a disinterested look crossed his face. “As if being invisible wasn’t bad enough, now I also have to be a woman!? You jerk!”

“Just for a little while. Relax. I can fix it, I’ll just need a few days to modify my formula and give it the proper structure, as well as synthesize a reversal formula.” He dismissed, not understanding my anger. “Besides, I saw all those weird, pervy comics you were reading a few weeks ago. Haven’t you dreamed of something like this for a while now?”

“L-Look, one… it's creepy that you were reading the comics in my stash. Two, fucking gross. Three… how the hell am I supposed to enjoy a female body that I can’t SEE?!” I listed off, grabbing my new invisible breasts in both hands, only to be met with a surprisingly… strong sensation from both of them. “Uh… I’ll talk to Chisa when she gets home… later. Fix this!”

I quickly left Yokota’s room, making myself scarce as I retreated to my room. I felt both embarrassed and ashamed to be in this kind of position. Yokota was right about one thing, I had always fantasized about being a woman, but those had always been fantasies, not reality. Now that it was real, I was suddenly conflicted as to what to do with myself. My brief flash of pleasure gave me the strong surge to… well, “flick the bean” as the chicks called it, but I had become very… self-conscious all of the sudden, even if no one was able to see me.

Chisa, our sister, and the oldest sibling, got home about half an hour later, hanging up her coat as she went to make herself a cup of coffee. I immediately went downstairs to meet her, only for her to nearly spill her coffee all over herself in shock at my seemingly disembodied female voice, and then for her to begin swinging a ladle in the direction of my voice. After calming her down and explaining the situation, I told her want Yokota had told me, getting her to roll her eyes. She was used to his experimental antics, and quickly decided that she needed to help me out. I was a little shocked she was taking such a personal interest in me, but I didn’t have much of a choice given I had no idea what to do with this new body.

Following her upstairs, she urged me into her bedroom, a place that was otherwise completely off-limits to my brother and I. She wasted no time opening her dresser and pulling out one of her t-shirts and throwing it at me, ordering me to put it on. I meekly obeyed, pulling it over my head as best I could, only to realize the two mounds on my chest were… too big.

“Are you kidding me?” Chisa sighed with an annoyed expression, running a hand through her silky black hair. “You’re… fucking huge…. you’ve gotta be joking me with this shit.”

She yanked my ill-fitting shirt off in a huff, pulling out a roll of measuring tape she kept in her dresser instead. “Turn around… I have to measure you to see if anything I have will fit.”

I did as she said, feeling her hands grab at my back, hips, shoulders and, eventually, chest. She had to “guess” where certain ends of my body were, given the fact that she couldn’t actually see anything. She managed to measure my hips and waist mostly without trouble, but my chest, the cause of this to begin with, was giving her more trouble than expected.

“Maybe I should make you wear a shirt or something. I can’t figure out where your stupid nipples are supposed to be.” She huffed, tracing her hands across my breasts to find them.

The truth was, I was enjoying the sensations… far more that I cared to admit. I was biting my own lip at one point in an attempt to simply keep myself from moaning out loud.

“There, found them. Stand still, you stupid titty monster.” She said, pulling the tape tighter against my hardening, invisible nipples. This was enough to finally squeeze a sudden, sharp moan out of me, so loud in fact that I was almost certain the neighbors must have heard it. “…OOOOOOOOK, then. I’ll just ignore that and pretend it didn’t happen. Agreed?”

“Y-Yes…” I agreed, pushing my hands into my red-hot face out of sheer embarrassment. This body was too much for me to handle, and the last thing I wanted was to make a scene.

“Alright, so some good news and some bad news.” My sister began, walking over to her closet. “First, the bad news. Nothing I own is going to fit you. Yokota apparently gave you some stupid, pornstar-level curves that I can’t work with. You're somewhere between 80 to 86 centimeters on your breasts alone. However, the good news is… I still have this!”

She pulled out one of her old bags from school, reaching in and yanking out an old uniform. It looked just like the one she used to wear in high school, but it was clearly bigger.

“This uniform used to belong to my friend Hoshie. She left it here by accident after one of our sleepovers, and never picked it back up.” She explained, putting the outfit down on the bed, even pulling out a pair of stockings. “She was only a size smaller than you, so hopefully this will keep you covered until our stupid brother is done reversing these changes.”

I looked down at the outfit, feeling my face go red once again. All of this was still too much for me to handle. Not only was I now an invisible girl, one who was apparently heavy on the curves, but now I had no choice but to wear this schoolgirl uniform if I wanted to be covered at all, something that seemed both very wrong and incredibly perverted.

“You better put it on. I just wasted half an hour of my time measuring you and being forced to listen to your moan.” She threatened, as if she was reading my mind. She must have guessed I would be apprehensive over this. “Besides, I’m not going to let you wander around the house without knowing where you are, not after that fiasco down in the kitchen.”

Sucking up what few objections I had, I did as she ordered, pulling on the uniform without too much trouble. The hardest things were the leggings, which were quite tight and hard to get my invisible feet into. Even so, it was clear I was just a bit too big for the uniform, especially since I couldn’t tuck in my shirt at all. After all was said and done, at least I was covered up to some extent. Looking back down at my legs as I sat down, I was shocked by just how… shapely they were, wondering about the rest of my body now too…