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Description
It took a few days for the confused girl to realize big bro had become panties for good. Big bro could never make a mistake, so it seems he wanted to change permanently. She tought it strange that he would throw away his life just to be wrapped around her ass, but big bro knows best! From that day the adorable little sister would gain a favorite pair of panties to be worn every day posible, and a constant companion she would care for and love forever.

As for the panties, they would surely become accustomed to their new life after a few years. He brewed that potion in the first place to get a closer look at his sister's body, so really he got what he wanted in the end.

Art is by Shibacha: www.pixiv.net/en/artworks/9384…

If you enjoyed this story, consider supporting me on Patreon: www.patreon.com/Dobole

Caption text:

So, do you like this big bro? Being, uhm… my panties… The way my butt stretches you out must be really nice, huh. Gosh, I never imagined you being such a perv. But it’s okay, I mean, I always thought you were kinda cute.

This is what you wanted, right? Yeah, of course it was. All those chemicals in your room, those notes about me. I was too embarrassed to read them all, but what I got was that you made some sort of potion to transform yourself. And with my big bro being so good at maths, he surely aced it!

Still, I can’t believe you turned into my panties of all things. And that you chose me from all girls. You’re just so smart, so funny, so strong… The way you always wanna help others, help me out… I just think you could have gone for a better girl, I… I’m nothing special, he-he.

*Prbt*

Ah! Oh, I’m so sorry, i-it just came out on its own! But maybe you also like that? All my panties end up really stinky, so I guess you would like it… Wow, I never imagined you could be so perverted. It’s… It’s kinda hot…

Well, uh, panties, maybe I should go and give you the full experience. I’m gonna go to the mall for a while, and you’re coming along! You’ll be snug under my shirt, wrapped around my hips, I’ll start working up a sweat and… maybe I’ll flash some guys with a peek of you? Ha-ha, I think some of your perviness is rubbing off on me.

Sis, please… just take me off! You’re such an idiot, why would I want to be wrapped around your ass? I’ve always told you how much I hate the smell! Ugh, it’s even worse up close, I can feel your fart trapped between my threads… Why did I dare meddle with alchemy? I just wanted to turn into a copy of you. But something went wrong, I don’t know what. Please, you have to help me so I can figure out what! I-Is that sweat? No! Please sis listen to me, you must! If I get too moist, I might not be able to turn back! Oh god it’s getting wetter… How? It’s not even that hot outside. Wait… this isn’t sweat!

Description
It took a few days for the confused girl to realize big bro had become panties for good. Big bro could never make a mistake, so it seems he wanted to change permanently. She tought it strange that he would throw away his life just to be wrapped around her ass, but big bro knows best! From that day the adorable little sister would gain a favorite pair of panties to be worn every day posible, and a constant companion she would care for and love forever.

As for the panties, they would surely become accustomed to their new life after a few years. He brewed that potion in the first place to get a closer look at his sister's body, so really he got what he wanted in the end.

Art is by Shibacha: www.pixiv.net/en/artworks/9384…

If you enjoyed this story, consider supporting me on Patreon: www.patreon.com/Dobole

Caption text:

So, do you like this big bro? Being, uhm… my panties… The way my butt stretches you out must be really nice, huh. Gosh, I never imagined you being such a perv. But it’s okay, I mean, I always thought you were kinda cute.

This is what you wanted, right? Yeah, of course it was. All those chemicals in your room, those notes about me. I was too embarrassed to read them all, but what I got was that you made some sort of potion to transform yourself. And with my big bro being so good at maths, he surely aced it!

Still, I can’t believe you turned into my panties of all things. And that you chose me from all girls. You’re just so smart, so funny, so strong… The way you always wanna help others, help me out… I just think you could have gone for a better girl, I… I’m nothing special, he-he.

*Prbt*

Ah! Oh, I’m so sorry, i-it just came out on its own! But maybe you also like that? All my panties end up really stinky, so I guess you would like it… Wow, I never imagined you could be so perverted. It’s… It’s kinda hot…

Well, uh, panties, maybe I should go and give you the full experience. I’m gonna go to the mall for a while, and you’re coming along! You’ll be snug under my shirt, wrapped around my hips, I’ll start working up a sweat and… maybe I’ll flash some guys with a peek of you? Ha-ha, I think some of your perviness is rubbing off on me.

Sis, please… just take me off! You’re such an idiot, why would I want to be wrapped around your ass? I’ve always told you how much I hate the smell! Ugh, it’s even worse up close, I can feel your fart trapped between my threads… Why did I dare meddle with alchemy? I just wanted to turn into a copy of you. But something went wrong, I don’t know what. Please, you have to help me so I can figure out what! I-Is that sweat? No! Please sis listen to me, you must! If I get too moist, I might not be able to turn back! Oh god it’s getting wetter… How? It’s not even that hot outside. Wait… this isn’t sweat!