In the Locked Room of the Third Floor, I Lost My First Official Bet
In the completely sealed chamber that blocked out every sound from the outside, nothing but a pair of naked man and woman remained.
Charlotte’s face was flushed crimson as she moved her hands in silence. She still could not understand how things had turned out this way.
“B-But at first… I thought we could just have a relaxing night together with Oppa…”
Whether “relaxing” was the right word for sharing a bed was debatable, yet the fact remained that she had not felt burdened by the hot night with Isaac.
Isaac himself probably did not realize it, but Charlotte remembered every reaction, every expression and gaze Isaac gave her whenever he was with her.
She had seen him treat her with the careful, fragile delicacy of a glass craftsman who might shatter at any moment, and still she had not understood his true feelings.
His words of distance and rejection had been nothing but lies. She could see them for what they were.
After all, he was obsessed with her. Far beyond the affection of an older brother who cherished his younger sister. The emotion between them had grown viscous and dangerous.
Perhaps he felt exactly the same way about her. The word “both” carried an unexpectedly sweet flavor.
Anyway, even if the explanation had grown long, the core point was simple.
Charlotte had never doubted that she could hold absolute dominance in her relationship with Isaac.
Why? Because he loved her. That was the reason she could demand whatever she wanted from him.
Moreover, did she not possess the ability to restrain him physically in a situation like this?
In a fair fight of pure strength, she would have no guarantee of victory, but there was a pre-condition: Isaac would never use that much power against her.
Everything in this lord’s castle had been arranged to allow her to tighten the reins and pressure him at will.
This tiny, precious space belonged only to the two of them, and especially the bedroom on the third floor, an inviolable sanctuary no one else could enter.
They could share love to their hearts’ content, mix their bodies, and whisper sweet words to each other.
This bedroom was exactly such a place.
“Ah… um, ah?”
…Up until now, that had been the case.
“It’s grown… even bigger…”
In other words, even the bedroom had become a space where Charlotte could no longer fully relax at this point in time.
She gazed downward with wide, trembling pupils. That meant she had no choice but to reach out, grip, rub, and shake—
That brutal male organ.
That is, Isaac’s penis…
SWALLOW
Charlotte forced down a dry lump of saliva as a wave of inexplicable dread washed over her.
What should she do? She had acquired enough knowledge of nighttime techniques to use on her older brother, yet
“T-That’s not enough to cover how to do it with my hands…”
How could she have known that a bet would be concluded so suddenly? Panic gripped her.
Was she doing the right thing right now? Beyond whether she won or lost the bet, was she truly making Isaac feel good?
After all, a wife’s duty was to satisfy her husband.
At least in Charlotte’s mind, this was an immutable truth, so she feared even now that Isaac might be displeased.
It was frustrating, but how could she bear to be the one who could not satisfy him?
STING
“…Ugh. Haa, huh.”
But that was not the only problem. It was already an exhausting task just to help him pleasure himself, yet
Charlotte could no longer deny that her own breathing had grown rough.
Why? Hadn’t the bet itself been set with that condition?
“I’ll give you exactly what you wanted—my cock. Come on, grab it and make me satisfied.”
Isaac had said. He would willingly hand over the “dick” she had been craving so badly—
“In return, I’ll furiously poke inside your thighs.”
You must offer up the most intimate parts. Let’s see if you can keep that shameless attitude even when you’re being stimulated.
“The one who finishes first loses. The one who makes the other finish first wins.”
It had been a spur-of-the-moment bet. She did not know whether Isaac had truly intended it, yet the effect had been tremendous.
“…Hah, haa, heuuu.”
Because her gauge had risen slowly but surely.
Assuming the limit was 100% for orgasm, she was probably around 65% now?
By experience, she had only needed to add a tiny bit of moisture at 90%, but
Her face had flushed to the absolute limit and now felt as if it might burst, while the moans leaking between her lips rose in a rhythmic crescendo.
Her lustful breaths came in short, sharp bursts… and Charlotte had completely lost all confidence that she was properly shaking Isaac’s member.
Only a new certainty rose in its place. That she would finish very soon.
She would indeed spurt with honor. Her legs would lose strength, and she would collapse while gripping him tightly.
And her expression would melt away like a woman who could not be endured by the world.
Charlotte decided it was time to acknowledge her defeat.
Her defeat was approaching right before her eyes.
“Ah, no… dehet…”
…But she could not accept it. It was unacceptable. How could she possibly lose the first official bet conducted so thoroughly against Isaac?
She could not allow it. She refused to allow it.
She wanted to see Isaac declare defeat in any way possible. She wanted to hear him say, “I can’t win against you,” and from now on follow her marriage requests without complaint…
“…”
She wanted to hear it. She wanted to hear it so desperately that she might even beg for it.
At that exact moment, a faint light faded from Charlotte’s pupils. More precisely, the concept of reason vanished in an instant from her mind.
Yet the flushed color, the heat, and the increasingly slick reaction between her thighs remained unchanged.
“…How is it, Roti? I bet it looked easy, but it turned out to be harder than you thought, huh?”
Isaac looked at his younger sister and twisted his lips into a cold smile.
Whether the method was fair or not, he had definitely landed one solid blow on Charlotte. The embarrassment of the situation was irrelevant. The core fact was that he had won.
It was easy to see that Charlotte’s condition was far from good.
“Press a little deeper inside—”
…That was why he had not worried about her lack of response and was about to declare the end of their bet.
“—Ah.”
Before that, Charlotte made a strange reaction. Her hazy pupils suddenly brightened, and with an intense light that seemed to convey enlightenment, she raised her head.
Isaac’s body jerked reflexively, but only for a moment. He quickly made a decision filled with ominous unease.
“Hah, extreme!?”
He forcibly moved his middle finger, which had been keeping Charlotte’s inner walls locked in place, and gave it one sharp flick.
His nail scratched the vaginal wall, and his fingerprint accurately rubbed her spot.
“C-Cum!” The already overflowing fluids exploded even more intensely.
“…Heung, haa.”
Still not enough. Only 2% remained until the limit, so Charlotte smiled calmly and tightened her grip even harder.
CRACK
“K-Kya…!?”
No matter how great an Archmage Isaac was, he could not have failed to flinch at that pressure.
Perhaps because he was a mage, he was even more vulnerable to such physical strikes.
Isaac’s body stiffened for an instant, and Charlotte did not miss the opening.
“…If we’re not going to mix our bodies directly, then… ha, hu… whether it’s my hand or something else… I’ll make you finish first, right…?”
“…W-What?”
“You’ve picked the wrong one to bet on, heuu. I have no intention of losing so easily, either.”
She spoke those words right after.
“…R-Roti?”
Isaac felt genuine astonishment at the sudden, unexpected action of Charlotte lowering her posture.
What was she trying to do all of a sudden? Even while feeling it, a burning unease lingered.
“…Here, everyone says it tastes disgusting and smells awful, right?”
“Roti…?”
“Because it’s Oppa’s dick. I’ll lick it especially sweetly for you, just like a delicious candy.”
Charlotte parted her lips with a sensual smile. Her tongue, glistening with a single drop of silvery saliva, extended.
“…”
Isaac felt as if his heart would stop at the mere sight. It was not an exaggeration; the sound of his heartbeat seemed to echo inside his head.
His penis, already handled roughly while trapped by Charlotte, had been on the verge of cumming from sheer stimulation.
He had not spoken because he thought he might lose the bet, but the sensation was far from pleasant. In fact, the opposite was true.
He felt a crisis that he might actually spew white fluid right then and there.
Yet because he could not lose to his younger sister, he focused even more intently on rubbing his middle finger and index finger, almost right at the edge of making her cum.
“I wonder if I can endure this too, my older brother.”
“…Wait…!”
The situation had completely reversed.
SLURP
“…!?”
It happened in an instant, like a flash of lightning with no time to process.
First, Charlotte’s tongue touched the tip. Where? Naturally, Isaac’s penis. The raised, throbbing veins on its surface.
“…K-Kup, kuu.”
Even that alone sent an unbearable jolt through Isaac’s entire body, but it was only the beginning.
While Isaac’s blue eyes trembled, Charlotte smiled faintly.
And with nothing but her gaze, she conveyed:
“Bon appétit?”
“…”
Even though his mouth did not move separately, the meaning was transmitted.
It was truly a mysterious experience. Isaac thought so, yet the random thoughts that might have arisen in such a situation vanished in an instant.
Charlotte opened her small lips wide. White teeth, a wet tongue, and even the dark red interior of her mouth glistened.
She tucked her light-blue hair behind her ear and revealed the entire landscape inside her.