Mesgaki Doyun
My older sister Sieun asked me to cosplay for her.
The moment I heard those words, my brain completely shut down.
Cosplay?
Well… it’s not like I couldn’t do something like cosplay.
If it was for Sieun-noona, I could put on as many outfits as she wanted.
What surprised me was the fact that the word “cosplay” had come out of Sieun-noona’s mouth at all.
Sieun-noona… did she actually have that kind of hobby?
…Wait. More importantly, why did Sieun-noona even own a cosplay outfit?
And not just any outfit — a male character costume that would actually fit me.
“Ugh… gross…”
Sieun-noona. You’re way more perverted than I thought, huh?
Buying clothes like this in advance just so you could make your little brother cosplay one day…
You’re a total degenerate.
“Ah… wait!!! I’m saying this because I’m scared you’re having some insane misunderstanding!!! I didn’t buy this outfit to make you cosplay! I got this from my viewers!!”
I hadn’t even said anything yet, but Sieun-noona immediately started defending herself like she had a guilty conscience.
Thankfully, that meant Sieun-noona wasn’t some perverted stalker who had secretly bought a cosplay outfit in my exact size while having dirty fantasies about me.
Whew. That’s a relief.
If she had been, my opinion of Sieun-noona would have dropped like a rock.
“Hey!! Ha Doyun!! You just had some incredibly rude thought, didn’t you?!!! I’m not that much of a pervert!!!”
Seeing how worked up she was, I suddenly felt like teasing her.
I stared at her with eyes full of obvious contempt.
For some reason, Sieun-noona’s face grew even redder.
“Ugh…! Y-you… don’t look at me with that expression…!”
…? What kind of reaction is that?
It gave off incredibly strong Chaewon-noona vibes…
Is it just me?
Oh, and just so we’re clear — “Chaewon-noona vibes” means she reminded me of a perverted bitch in heat who gets off on her little brother.
Hmm… Nah. No way.
There’s no way Sieun-noona is a pervert who gets excited from being looked at with contempt by her little brother, right?
That doesn’t make any sense.
It must just be my imagination.
Anyway. I should probably stop messing around and have a proper conversation now.
I softened my previously sharp gaze back into my usual innocent, puppy-like expression and flashed her a bright smile.
“Hehe. Okay! I’ll cosplay for you, Sieun-noona! Go get the outfit right now!”
“Ah… you’re really going to do it…?”
“Of course. Didn’t I say I’d do anything for you earlier? I wasn’t just saying that.”
“R-really…? Then… maybe I should have asked for something else…?”
“Hm? What did you say? Your voice was too quiet, I couldn’t hear.”
“Ah… it’s nothing! I’ll go find the cosplay outfit! Just wait a second!”
Sieun-noona started frantically rummaging through the corner of her room.
She found the cosplay outfit surprisingly quickly.
She handed me a paper bag.
Inside was the cosplay costume.
Thanks to all the degenerate games I’ve played, I instantly recognized which character it was.
It was a cocky half-dragon character who was insanely popular with women.
Because of his somewhat youthful appearance, though, you could get in serious trouble if you praised the wrong parts of him.
But in other words, it was the perfect cosplay for someone like me — cute and lovable.
I wasn’t particularly interested in cosplay, but becoming a character from one of my favorite games was pretty exciting.
Plus, the quality of the outfit was so high that I actually wanted to try it on.
“Whoa… they recreated it this well? Isn’t something like this super expensive?”
“I wouldn’t know. I didn’t buy it in the first place.”
“Hmm… Anyway, can I just put this on? There’s no special way to wear it, right?”
“I think you can just wear it normally.”
I didn’t know much about it, but I’d heard that cosplay outfits were usually pretty difficult to put on.
I’d seen YouTube videos where people used wires or something to hold the clothes in place.
Luckily, this one didn’t seem to be that type.
It looked like I could just put it on like normal clothes.
I took the paper bag with the outfit and went into my room.
After quickly changing, I checked myself out in the mirror.
The hairstyle and small details were completely different, but the outfit itself was perfect.
As cosplay, it was a total miss. But in terms of sex appeal, it was a perfect score.
If anything, my cute and lovable appearance might make it even more arousing than the original character.
In my opinion, it was a ten million out of ten, but still — better to ask someone else.
When evaluating yourself, asking others is the most effective way.
I scampered back to Sieun-noona’s room.
Before opening the door, I called out to her first.
“Sieun-noona. This looks really cute and lovable, okay? So don’t get too shocked when you see me~”
“I don’t want to. I’m going to be super shocked. I’m really looking forward to it! Doyun-ah!!”
“You might have a heart attack, you know?”
“Hehe… If I’m going to die, I’d rather die by your hands than get beaten to death by Mom or Ha Chaewon.”
This girl is for real.
She never loses a single exchange.
Hmph! Then I guess I have no choice.
I was originally planning to just act cute and let it slide, but now I’m going to go all out.
I’ll show you the ultimate cosplay!!!
Click—
I opened the door and stepped into Sieun-noona’s room.
The moment she saw me, her eyes widened like saucers.
Whether the cosplay suited me even better than expected, or whether Sieun-noona was actually the same type as Chaewon-noona, the effect was undeniable.
But it wasn’t over yet.
I still had my secret weapon left.
This character was extremely arrogant.
In simple terms — a mesgaki.
The kind of character who mocks older women, gets all “hueeeh~” and then receives proper discipline.
Matching the character’s personality, I put on an arrogant, mischievous expression.
“Heee~ What’s this? For someone who was so confident, you look totally shocked. Where did all that energy from earlier go?”
“Y-you… Doyun-ah…!”
“Pfft. A pathetic guy who can’t do anything when a boy acts cute~ Look at you blushing just because a cute guy like me is talking to you~ You’re giving off total virgin energy, 500%~”
“…”
“What’s wrong, what’s wrong? Can’t even speak now? That’s why you’re still a virgin at your age. Seriously~ Poor little pussy that can’t even see a dick because you met the wrong owner~”
“…Hngh.”
…? Hngh?
What the… I thought Sieun-noona would snap back at me for being so rude according to the concept, but her reaction was completely different from what I expected.
Even after hearing my insults, Sieun-noona just stood there quietly.
Instead, her face turned red and her body trembled… It honestly looked like she was getting excited.
…No way. Right?
Does this actually work on her?
Sieun-noona… did she really have this kind of taste?
“Hngh… ugh…”
Sieun-noona still couldn’t say anything and was only making female animal noises.
It looked like she was waiting for me to keep insulting her.
To think Sieun-noona was a pervert who got excited from being verbally abused by her little brother…
…This is actually pretty great?
I’d said it before with Chaewon-noona too, but I don’t really have any aversion to incest.
If anything, I have fantasies about my pretty older sisters.
Sieun-noona’s bitch-in-heat behavior was incredibly satisfying.
And if this stacked blonde beauty was actually a perverted masochistic sow who got wet from verbal abuse, that was even better.
Ah… I like this way too much?
Should I completely train Sieun-noona while I have the chance?
…Nah. That’s going too far.
I’d only just started doing “breast massages” with Chaewon-noona recently. If I turned Sieun-noona into my personal masochistic bitch slave?
I might be fine, but Sieun-noona would be in serious trouble.
If Chaewon-noona ever found out, she’d beat Sieun-noona like a dog on a hot summer day.
Chaewon-noona is surprisingly possessive and jealous.
Yeah. Training Sieun-noona into a masochistic bitch is a bit much.
But… a little bit of play should be fine, right?
After all, the whole reason I was cosplaying was to apologize for blowing up Sieun-noona’s stream.
Since it’s come to this, I should give Sieun-noona a good experience.
Keeping my expression playful and arrogant,
I grinned like a mesgaki and pressed my finger firmly against Sieun-noona’s womb.
“Getting excited from seeing your little brother in cosplay, you pervert~ Your womb is throbbing because your little brother is insulting you, you irredeemable masochist~ It’s honestly disgusting. You’re wasting oxygen, so just hold your breath and die already~”
“Hngh…! U-ugh…! Doyun-ahhh…! Stop teasing your noona…!”
“Pfft. It’s hilarious how you’re saying that while your pussy juice is dripping everywhere, you know?”
I didn’t actually know if Sieun-noona was really leaking love juices.
I was just saying whatever came to mind.
Still, judging by Sieun-noona’s expression, it seemed her body really was heating up.
“Stop…! Stop it…! If you keep doing this…! You’re really going to get in trouble…!”
“Haha. So funny~ There’s no way a perverted inferior female who gets excited by a cute boy like me could ever punish me~ Don’t get cocky and try to climb above your station~”
Ah… I was only planning to do it lightly, but now I’m starting to get a little turned on too?
It’s so much fun tormenting Sieun-noona, who I usually treat as my actual older sister!
Then… should I mess with her a little more?
“It pisses me off that a pervert like you is taller than me and looking down at me. So get on your knees right now, you pathetic loser~”
The command to kneel.
This meant I would no longer treat Sieun-noona as my older sister.
She knew it too.
If she knelt like I told her to, there would be no turning back.
That’s why her gaze was shaking so violently at my command.
But I already knew.
Sieun-noona would eventually kneel before me.
Because she was a total pervert.
Her reason had already been swallowed by lust and could no longer function properly.
In the end, Sieun-noona slowly — but of her own will — knelt down.
Looking up at me, she waited only for my commands and insults.