Dear Sisters
Acting like a child who had lost his memory, Tang Hwi felt no shame whatsoever. Or rather, he felt a twinge of it, but not enough to disturb his absolute composure. Having lived countless lives, he had even worked as a professional assassin. Once, to eliminate the Alliance Leader, he had spent three days and nights submerged in a latrine before successfully pulling off the deed. Compared to that ordeal, his current embarrassment was a luxury.
'Seducing Sister in time is impossible through conventional means. She will only act voluntarily if she is placed in an unavoidable situation.'
That was why, when he was hit by the palm strike, he had intentionally guided it toward his solar plexus. By exposing his vital point and disguising it as an accidental hit, he had placed a heavy burden of guilt onto her fragile shoulders. She was already deeply shaken by the fact that she had reduced her newly reformed brother to this state. Seizing that opening, he was presenting her with an "unavoidable situation" to break her defenses.
"S-Sister... My... my pee-pee hurts..."
Tang Ga-hui froze as she stared at the tent rising tautly beneath the blanket, fully erect. Even through her veil, her sheer shock was plain to see. Yet, acting like an innocent child who had never received any sex education, Tang Hwi merely whined that his pee-pee hurt, pretending not to know why.
"......D-Does it hurt a lot?"
She must have been incredibly shocked. Only after barely breaking out of her stupor could she squeeze out that single question.
"Uh-huh... It feels tight... and it hurts. It feels like I want to pee, but the pee won't come out?"
"I... I see..."
She was clearly flustered, but Tang Hwi, playing the role of a regressed child, pretended not to notice and continued to complain.
"Am I... do I have to pee?"
"......Y-Yes. You need to pee, but because your mind has become young, your body isn't listening to you."
Perhaps she lacked the confidence to give an impromptu sex education lesson to a child and explain that he was erect due to pent-up lust. Tang Ga-hui explained his condition as a disconnect between his mind and body. At her words, Tang Hwi sniffled, putting on a frightened expression.
"Then am I... going to wet the bed? Like a baby?"
"......Mmm."
She had resolved to nurse him and attend to his needs. But who could have imagined that her patient would be a mentally regressed younger brother? Furthermore, because his physical body was naturally that of an adult, the disconnect left Tang Ga-hui utterly at a loss. Normally, an erection would subside with time, but because Tang Hwi's mind was that of a child, he had no intention of controlling his surging lust.
'It's already been nearly ten minutes, and it's still standing. He needs to release his fluids...'
Glancing at Tang Hwi, she saw him tearing up, looking utterly miserable at the thought of wetting himself. In this situation, explaining semen or ejaculation would be pointless; he wasn't in a state to handle it himself. What should she do? Should she back out now and call a maid trained in sex education to relieve him? But they had agreed to keep Tang Hwi's condition a secret to prevent the incident in the Patriarch's Pavilion from leaking out. Explaining the situation to others would only make things worse. Did she really have to relieve him herself?
"Sister will... help you pee. But it might be embarrassing, so I'm going to put you to sleep first, okay? Is that alright?"
"Ah! You're going to press my sleep acupoint!"
"Y-Yes. Our Hwi... is so smart."
In the end, the solution Tang Ga-hui came up with was to strike his sleep acupoint and release his essence while he was unconscious. That way, the regressed Tang Hwi wouldn't have to feel embarrassed, and his condition would improve. True, she would have to use her own hands to stroke her brother's member, but... she just had to swallow her shame and endure it.
"Then do it."
"Aren't you... embarrassed?"
Seeing Tang Hwi ask so confidently, Tang Ga-hui was bewildered. Even if they were siblings, he was about to expose his private parts, yet he didn't hesitate for a second. He might be pure because of his young mind, but children could also easily misunderstand such boundaries. When she hesitated, Tang Hwi looked at her as if she were asking something obvious.
"You're going to marry me anyway, Sister! They said it's not embarrassing to show my pee-pee to my bride."
"......"
Perhaps because of his regression, he was truly innocent. While Tang Ga-hui found this unexpected side of her brother fascinating, she knew further conversation was pointless. Seizing the moment while he was distracted, she struck his sleep acupoint so swiftly he wouldn't even realize it. Seeing him instantly fall into a deep slumber, Tang Ga-hui let out a sigh of relief, knowing the acupressure had worked perfectly.
"Whew. It's been a while, but it worked perfectly. Thank goodness."
But could she really call this a relief? The moment she realized her next task was to pull down Tang Hwi's pants and undergarments to expose his erect member, her face flushed crimson. Since her betrothal to the Moyong Clan had been called off, she had never been close to a man. Having only half-heartedly listened to the bedroom arts training meant to please a future husband before abandoning it, she had absolutely zero tolerance for men. Who could have imagined that the first man's semen she would ever extract would belong to her younger brother? Her face, stained red with a mix of shame and guilt, twisted into a near-tearful expression.
Slowly pulling down the blanket, she tensed up at the sight of the towering bulge in his trousers. She recalled hearing that a man's tool was considered large if it reached half a chi. Yet, even through his pants, Tang Hwi's member looked to be nearly a full chi. No matter how much of an outlier someone could be, was it even possible to exceed the average by such an astronomical margin?
She carefully untied the knot of his belt. After undoing the simple, masculine knot, Tang Ga-hui pinched the waistband of his trousers with her thumbs and forefingers, slowly pulling them down.
Boing!
"......"
If she had been silent before out of speechlessness, this time she was rendered mute by sheer shock. Her lips, which had been glued shut, parted in absolute shock. Gaping, Tang Ga-hui stared at the colossal shaft, seriously wondering if it was as long as her own head. To say she was traumatized would be an understatement.
'Will the sister-in-law who marries Hwi in the future even be able to endure this?'
No, wait. He had just told her to marry him, so maybe she would be the one who had to take it—
Slap!
"W-What on earth am I thinking?!"
Perhaps the shock had been too great. For a brief second, a completely insane thought had crossed her mind. Tang Ga-hui shrieked softly and slapped her own cheeks. She had surely lost her mind upon seeing his monstrous member. Otherwise, there was no way she would fantasize, even for a moment, about intertwining her body with Tang Hwi's and making love!
Of course, this was actually due to Tang Hwi subtly releasing the energy of his Yin-Yang Erotic Art into the air. Normally, such a wasteful use of internal energy would have no effect. However, because Tang Ga-hui had been so tense, it had taken her nearly half an hour just to pull down his pants in close proximity, leaving her exposed to its influence for far too long.
Gulp.
Suffocating under the tension, she reflexively swallowed her saliva. Though she felt a deep sense of depravity knowing it belonged to her own blood, the sheer novelty of seeing a male organ for the first time sent waves of excitement and anxiety crashing through her entire body. She could barely comprehend her own state of mind, but one thing was certain: she had to release Tang Hwi's fluids right now. Deciding she had to use her hands, she reached out and grasped his erect shaft, only to gasp in surprise.
"I-It's so hot. Much hotter... than I expected."
It felt as though she were holding a pillar of fire. She had heard that practicing martial arts rooted in pure Yang energy made one's body emit heat. Did this mean Tang Hwi's Yang energy was so immense that his body heat rivaled those legendary divine arts? Even using both of her hands, she could barely wrap them around half of his shaft. The raw, masculine scent unique to a man's chamber combined with the intense heat made Tang Ga-hui's head spin.
Stroke. Stroke.
Still, she had no trouble applying the bedroom arts she had learned from married maids just before her marriage talks had begun. In fact, the heat and his masculine scent forced her to focus entirely on the technique. She could vividly feel the thick veins bulging along the rock-hard shaft brushing against her palms. The fact that she could feel the soft, pulsing veins so clearly meant she was pouring every ounce of her attention into her hands. A sister focusing entirely on stroking her younger brother's cock with both hands... Realizing that there couldn't possibly be another pervert like her under the heavens, she was overwhelmed by a crushing wave of self-loathing.
'But... this is for Hwi's sake.'
This disaster had happened because of her. Before being his sister, she was a martial artist, and she had to take responsibility.
"...Ah!?"
As she stroked his shaft up and down, a sticky fluid began to seep from his tip, coating her hands. Serving as a natural lubricant amidst his intensifying masculine scent, her handjob began to pick up speed. Feeling her brother's member throb and twitch in her grasp, Tang Ga-hui knew she was doing it right. Bringing her own brother to climax with her hands...