My Masochistic Big Sister Loves Getting Her Tits Crushed
Sieun knelt obediently in front of me.
Her face was flushed with excitement, chest heaving as she panted, waiting only for my command.
Watching Sieun completely submit to me made mischief bubble up inside me like crazy.
The deeper she bowed her head, the more I wanted to mess with her.
Ah… this is way too good.
My own big sister—a top-tier corporate streamer and stunning blonde beauty—was on her knees before me, having thrown away every last bit of pride.
This was the absolute best situation ever!
It didn’t even compare to when I’d given Chaewon that breast massage!
But I can’t completely cross the line. Before we start playing properly, I need to draw a clear boundary.
Sex was obviously off the table.
I wasn’t going to take off any clothes either.
Someone might ask what I was even planning to do, but the most I could give Sieun right now was this.
“Sieun. Open your mouth.”
“Huh…? Mmm… okay…”
Sieun obediently parted her lips.
Her pretty, wet entrance glistened with a lovely red hue.
I drooled a thick strand of spit right into it.
“Bleh—”
“?!!!!”
“Ah. Don’t speak. Keep your mouth open just like that. And don’t swallow.”
“Haaah…!! Haaah…!!”
She clearly hadn’t expected me to spit in her mouth. Sieun looked completely lost, her reaction a chaotic mix of panic and arousal that was impossible to miss.
But she didn’t seem to hate it.
In fact, she looked like she actually enjoyed receiving my spit.
Wow. As expected from Sieun.
She really is a full-blown perverted masochistic bitch.
How the hell can someone get off on their little brother spitting in their mouth?
To Sieun, was my spit just a reward?
“Pfft. You really do look like a total pervert, Sieun. Does keeping my spit in your mouth feel that good?”
“Haaah…!! Haaah…!”
I couldn’t make out what she was trying to say, but I figured it meant she liked it.
Otherwise she wouldn’t have her nipples standing up so stiffly like that.
I planted my foot on top of Sieun’s smooth, beautiful thigh and pressed down hard. At the same time, I reached out and pinched her erect nipple between my fingers.
“?!!!!”
The sudden pinch must have been too intense. Sieun’s whole body jerked, then began trembling violently.
But to her credit, she obeyed my order until the very end.
She kept her mouth wide open, holding my spit inside, while staying on her knees and looking up at me.
“Sieun. What do you want me to do to you? Should I spit on your face? Or maybe shove my cock into that clueless little hole of yours?”
“?!! Haaah…!!!”
“Hehe. You get all excited the second I mention giving you cock. It’s honestly hilarious. You really are a bitch in heat.”
“Haaah…!”
“Making that pathetic face won’t get you any dick. Because I have zero interest in having sex with a disgusting masochistic bitch who gets wet from swallowing her little brother’s spit.”
If I actually had sex with Sieun, Mom and Chaewon would literally kill her.
I’m the one keeping her alive, so she should be grateful.
Instead, I’ll give her something else.
For a perverted masochist like her, it’ll probably be an even better reward.
Sieun was still lying there with her mouth open toward the ceiling.
I pushed her over.
Even after falling, she kept my spit in her mouth. That was kind of cute.
Hmm. Good. I like that.
Then I’ll specially bully her in Mesugaki Mode.
With a mischievous grin, I looked down at her and said,
“You fell over from just that? What a pathetic weakling for a girl~ An inferior perverted bitch who can be pinned down with just one finger~ Yeah, crawling on the floor like that really suits you~”
“Haaah…!”
“Pffft. It’s honestly gross how you’re still holding my spit in your mouth like it’s precious. So just shut up already~”
“…!!”
“Haha. The way you actually shut up the second I tell you to is so pathetic~ You look like a total idiot~ But even if you listen to your little brother so well, I’m still not giving you sex, you know? You’re gonna stay a virgin forever and die that way~”
“…!!!!”
This much verbal abuse should be enough as an appetizer.
Now for the main course.
I placed my foot on Sieun’s breasts as she lay on the floor.
I could feel her hard nipples poking against my sole. It felt strangely ticklish.
“…!!!”
By now, Sieun must have realized what I was about to do.
I was going to stomp on her tits with all my strength.
If she took this, there was no way she could hold back. She would definitely cum in the most pathetic way imaginable.
With my spit still in her open mouth.
Completely defenseless, lying flat on the floor.
Cumming from having her breasts crushed by her little brother?
Whoa. A normal person would never be able to endure that level of humiliation.
But then again, when has Sieun ever been a normal pervert?
She’s the kind of masochistic bitch who gets her nipples rock hard just from being verbally abused by her little brother. This much should be easy for her.
So good luck, sis!
“Hup!”
With a spirited shout, I stomped down on Sieun’s breasts with everything I had.
No matter how strong an A-grade Hunter’s body was, having her bare breasts crushed while completely defenseless was bound to send a massive shock through her.
For a normal person, that shock would have been pain.
But Sieun was different.
To her, having her tits stepped on by me wasn’t pain—it was pure pleasure.
I could say that with absolute certainty.
Because right in front of my eyes, Sieun came while violently squirting her juices everywhere.
She even drooled my spit all over herself as she had the most pathetic orgasm imaginable.
“Hiiit?!!! Hyaaat!!!! Hnnngh!!!!”
Her whole body convulsed from the short but intense pleasure, then she collapsed completely exhausted onto the floor.
Afterward, Sieun twitched her hips, savoring the lingering aftershocks of her climax.
###
Quite a while after Sieun’s pathetic masochistic orgasm.
She had finally regained some of her senses.
Only then did Sieun realize what she had done—and what kind of face she had shown me.
The first thing she did was perform a dogeza.

Sieun slammed her head to the floor in a perfect dogeza, shouting at the top of her lungs.
“Doyun!!! I’m so sorry!!! Everything was my fault!!! So please… please don’t tell the rest of the family!!!!”
Now that her reason was returning, Sieun finally understood just how pathetic she had looked.
Without thinking about the consequences, she immediately started apologizing to me first.
She must have decided that was the right thing to do for now.
Yeah. Not a bad judgment call.
After all, if Mom or Chaewon found out what happened today, Sieun would be completely destroyed.
But she didn’t need to worry that much.
Because I had enjoyed it too.
Personally, I really liked pathetic masochistic pervert Sieun.
She was still pressing her forehead to the floor in dogeza.
I gently stroked her hair and said brightly,
“It’s fine, Sieun. Actually, I had a ton of fun too! So there’s no need to apologize at all! If anything, I’m sorry for blowing up your stream.”
“B-but…”
“Come on. Are you embarrassed because you showed me how much of a pathetic masochistic pervert you are? You don’t have to feel shy. I completely underst—”
“Kyaaah!!! Wait, wait!!! Don’t talk about that!!! Just thinking about it now is so embarrassing!!!”
Well, I guess cumming like a pathetic premature-ejaculating slut and squirting all over the floor in front of your little brother isn’t exactly something to brag about.
Still, it’s okay!
I like that perverted side of Sieun!
In times like this, I need to show some tolerance!
So I smiled even brighter and told her it was really fine.
“You don’t have to be embarrassed, sis. I like that part of you. Actually, I’m pretty perverted myself~”
“…Really?”
“Of course~ Didn’t I say it earlier? I enjoyed it so much~ It was super fun being able to bully you as much as I wanted!”
“…I-is that so? Haha… I don’t know if I should be happy about that… or sad… But if you had fun, then I guess that’s good.”
The more I reassured her, the more relaxed Sieun became.
Good. I successfully calmed her down.
Now the only thing left was figuring out what our relationship would be like from now on.
I didn’t have any particular thoughts about it.
Today we just happened to click and enjoyed some playtime. I figured we’d go back to normal after this.
But Sieun was thinking something completely different.
“Th-then… does this mean we’re dating now? No, not dating—should we get married? It might be a little hard since we’re siblings… but that’s okay! I’ll figure something out! Doyun, you don’t have to worry about anything! From now on, just trust me!”
“…Huh?”
“Hehe. I can’t believe I’m actually going to marry Doyun… I only ever imagined it, but now that it’s really happening, I’m so happy… My first love is finally coming true! Since we’re having a wedding, we should make it huge, right? Yeah, let’s do that. Ever since I was little, I dreamed of getting married in a massive wedding hall. Kissing Doyun in front of everyone…!! I want to tell the whole world that this man is mine…!!”
Sieun was seriously thinking about marrying me.
Ah… this is bad…
This wasn’t the development I wanted at all.