Ryuz, who was about to say something, shut her mouth tight as she watched her sister climax.
Both wrists tied, eyes covered.
If it were Ryuz, who had enjoyed all sorts of play with me, she could roughly guess what was going on just by looking at the situation.
“…I knew you two had some kind of relationship, but I didn’t expect you’d go this far.”
“Really? Today’s actually rather tame.”
I removed my hands, which had been freely fondling Lorein’s chest.
Only then did Lorein let her body go slack, feeling the lingering pleasure.
Her perfect body, filled with lust, exuded a strong scent of femininity no matter how you looked at it.
Ryuz, watching that scene, gulped.
“Yeah. She’s blindfolded, and she can’t hear anything. She can’t even imagine you’re here.”
“Hmm~”
Ryuz, with a slightly intrigued expression, slowly approached her sister.
She looked at her heaving, pleasure-filled body as if she didn’t like it.
“…So this is how my sister climaxes.”
“What do you think?”
“She’s pretty even to another woman. Especially her waistline… I can see why men like her.”
“Don’t you want to ruin your sister like that?”
Ryuz looked back at me with surprised eyes.
“Ruin her?”
“For now, she’s still okay. But Lorein will start feeling pleasure and won’t know what to do, begging for more.”
“……”
“Seeing a prideful sister crumble can be quite amusing.”
Even as I spoke, I could tell Ryuz was very interested in this.
From the beginning, Ryuz had strong admiration and inferiority towards her sister.
Now that she was competing with her as a woman over me, jealousy was added to that mix.
Given that, Ryuz probably had a desire to see her sister’s vulgar and shameful side.
Breaking down the sister she respected would surely be a thrilling experience.
Ryuz, who had been trained and educated in various ways by me, already knew that.
“…What do I have to do?”
As expected, Ryuz quickly took the bait.
“It’s nothing much. Just join in while I caress her.”
“Won’t we get caught? Your caresses feel much better than masturbating.”
“We’ll use a brush, so it’ll be fine. Even Lorein can’t notice that while she’s panting.”
“…This sounds fun. So my sister will think it’s you but feel it from her younger sister?”
As expected of my student, she grasped the core of this play perfectly.
A teacher feels proud to have a smart student.
“Hyun-woo… Are you really there?”
Maybe because she had been left alone for too long during our conversation, Lorein called out to me in an anxious voice.
I gently patted her head to reassure her.
“Lorein will think it’s me giving her pleasure and get deeply immersed in it. And then, when the blindfold comes off, she’ll realize the truth.”
Realizing that the pleasure she felt and the panting she did was actually caused by her younger sister.
The expression on Lorein’s face when she realized that…
My heart raced like a child receiving a present.
“Shall we start then?”
“Hmm, being in the same position as your captive… I’m a bit worried I might end up in a similar situation someday.”
“So, are you not going to do it?”
“I’ll do it.”
With a seductive smile, Ryuz took the brush.
Her face showed an excitement similar to mine.
We lined up side by side and tickled Lorein’s chest with the brush.
Doing this with her younger sister was definitely more exciting than usual.
“Aah! Ah! My chest is so sensitive right now…!”
Lorein panted heavily as soon as she was touched.
Ryuz didn’t miss a single detail of that sight.
“…It’s the first time I’ve seen my sister so weak.”
“Really?”
“Yes, my sister makes such a sweet voice while feeling pleasure?”
Ryuz couldn’t hide the interest and a strange sense of conquest that appeared on her face.
I had seen this side of Lorein countless times.
But for her younger sister Ryuz, it was a completely new experience.
Who could have imagined that cold Lorein would pant like this?
Even I, when I had just arrived at the mansion, couldn’t have imagined such a scene.
“…My sister, who always seemed so grand, is just a bitch in front of a man like you.”
Ryuz quickly got into the mood of tormenting Lorein.
Maybe because she had experienced intense torment focused solely on her chest herself.
The brush swayed teasingly, persistently targeting the nipples.
“Aah! Ah! Wait, not there…!”
Lorein’s body flinched in response to the teasing brush movements.
Her slender waist kept bending.
If she hadn’t been tied up, she might have resisted quite strongly.
“Is my sister usually this sensitive in her chest?”
“Her reactions might be better because she’s blindfolded. Even though she’s sensitive, she’s not as sensitive as you, Ryuz.”
“Hmm, well, unlike me, my sister doesn’t have inverted nipples.”
Ryuz swallowed as she watched the panting Lorein.
“Teacher…”
“Hmm?”
“I can’t hold back anymore…”
Ryuz slowly took off her top.
A massive piece of flesh wrapped in pink underwear greeted me.
Her face was already filled with lust.
“Pfft. Seeing your sister feel that way turned you on?”
“…Yes, I just keep getting more and more excited.”
I understood how Ryuz felt.
Right now, Lorein’s appearance wasn’t just provocative, it’s downright obscene.
Tormenting her directly would surely be arousing.
Above all, Ryuz had more experience with her breasts being tormented.
She probably naturally remembered her own experiences while watching Lorein feel it.
Including the pleasure she felt during those times.
“Shall we enjoy this for a moment?”
There’s no question about Lorein’s perfect figure.
But seeing Ryuz’s inverted nipples made me want to enjoy her in a different way.
“What about my sister?”
“It should be fine for a little while.”
We enchanted the brushes side by side.
The brushes floating above Ryuz’s breasts lightly swayed and stimulated her nipples.
“Ugh… Haa… Haa…”
Although the stimulation was different from using hands.
Lorein, in her current state, wouldn’t notice.
Even if she felt a sense of incongruity, she wouldn’t imagine that we’d be doing this with another woman right in front of her.
“Heh… She’s just feeling it without knowing who’s moving the brush. What a fool.”
“Hey, don’t tease your sister.”
“Ah… I’m sorry… Ah… ♥ Mmm…”
Soon, Ryuz and I began kissing.
Embracing each other, we explored each other’s lips and tongues intensely.
The feeling of her large breasts pressing against me was pleasant.
“Mmm, chu… Ha…”
To leave someone like Lorein blindfolded and neglected.
And to kiss Ryuz, her younger sister, right in front of her.
The sense of immorality in this situation was overwhelming.
“Being able to monopolize you while my sister is tied up… It’s so exciting.”
Ryuz, sharing the same sentiment, rubbed her body against mine with a seductive smile.
I extended my hand and grabbed Ryuz’s breast.
Ryuz shivered and felt a light pleasure.
“Ah, Teacher… ♥”
Ryuz’s pink nipples were revealed.
I sucked on them while gently stimulating one of her breasts.
“Ha… Ah… Your tongue feels so good…”
“As expected, Ryuz’s breasts are very sensitive.”
“Hmm… It’s because you’re touching them… Ah… I’m going to cum…”
It didn’t take long for Ryuz to climax just from her breasts being caressed.
She seemed to get quite excited at the thought of doing this in front of her sister.
“Haa… A tingling pleasure is running down my spine…”
“Now that you feel good, shouldn’t we also make your sister feel good?”
“Yes, we should. I want to torment her until she pants more♥”
After climaxing once, it seemed Ryuz enjoyed this play even more.
She enthusiastically picked up the brush and started swirling it again.
“Ah! Ha…! Suddenly, it’s so intense…!”
Lorein’s tormented body was once again being teased.
I gently spread her thighs.
I saw her pink, twitching, wet hole.
“Hm… This is my sister’s pussy…”
While still tormenting Lorein’s chest with the brush, Ryuz looked down there.
Her violet eyes held a slight desire.
Although she could climax just from her chest being stimulated, touching the pussy brought a different level of pleasure.
“Ryuz, would you like to try touching here too?”
“Hmm, but with your skills… Won’t we get caught if we touch here?”
“Then I’ll touch her pussy. You just stroke her clitoris with the brush. Lorein is very sensitive there too.”
“Wow, Teacher, your ideas are really perverted.”
I admit, they were.
Ordering a younger sister to tickle her sister’s clitoris with a brush.
But Ryuz’s face was filled with interest.
“…I wonder what kind of voice my sister will make.”
As Ryuz spoke, she stroked the clitoris with the brush.
I gently stimulated her pussy in response.
“W-Wait…! Stimulating both my clit and pussy at the same time is too much…! Haaaaaa!”
Lorein’s body jerked and she climaxed instantly.
Her head was thrown back to the limit.
From our position, all we could see was her protruding tongue.
“Aaaaah! Haang!”
But this time, neither Ryuz nor I stopped.
Lorein, unaware that her younger sister was the one tormenting her clit, climaxed several more times in the end.