Heart-Shaped Pupils
In the dim morning light of the dark bedchamber, Sia opened her eyes. She was startled to realize she had fallen asleep again. Suffering from the Insomnia Curse, there were precious few days when she could ever rest. She shifted beneath the covers, craving a little more sleep, only to find that nothing felt familiar. The room’s layout seemed different, and the bed itself was far too vast.
“Brother, are you awake?”
“Ah… yes.”
Only after hearing Lua’s voice did the memories of the previous night flood back. Sia remembered she had agreed to sleep in the Grand Duke’s quarters with her. She must have passed out from exhaustion after Lua had used her so roughly the night before. Had they truly spent the entire night together in this bed?
“Um… Brother.”
“Mmm?”
Swish.
“Hiiik?!”
Suddenly something flipped her skirt up and struck between her legs. A sharp, electric jolt raced up her spine and into her brain, forcing her back to arch involuntarily. At first she assumed it was Lua’s mischievous hand, but this was something far more dangerous.
“This… it can’t be…”
Lua, lying beside her, pressed her enormous, soft breasts against Sia’s back. The mere contact of those breasts was enough to flood Sia with shame, yet it was nothing compared to the sensation between her thighs.
“I… I should be getting up to prepare for the day, but the moment I opened my eyes, it got hard again…”
“I-I understand.”
When Sia had still been a man, she too had woken to the sight of her own rigid morning erection lifting the sheets. Given how overwhelmingly strong Lua’s libido was, it was only natural for her to be hard every morning. That thick, unyielding shaft was now nestled between Sia’s thighs.
“Just stay still, Brother. I’ll take care of it quickly and be on my way.”
“Mmm… yes. Use my body however you need.”
For some reason, at the words use my body, the massive cock twitched powerfully against her.
Lua reached out and gently pulled her brother into an embrace. Her explosive breasts squished against Sia’s back, molding to her like warm dough. Sia’s face burned crimson.
Plap! Plap!
“Ahh?! Nngh!♡”
“Ah…♥”
Each roll of Lua’s hips sent her body slapping against Sia’s ass with an obscenely wet sound. Her cock, already glistening with precum, slid smoothly between Sia’s thighs. Every time the huge shaft thrust in and out, the swollen head kept brushing against Sia’s folds.
The strange, floating sensation made Sia’s mind drift; moans spilled from her lips without permission. Desperate to resist the feeling, she tried to squeeze her legs together.
Plap! Plap! Plap!
“Brother’s… hah… thighs feel so good…♥”
“Hnn?!♡ Nngh…!”
Sia’s small act of resistance only heightened Lua’s pleasure. The smooth, elastic pressure of those slender thighs, combined with Sia’s delicate strength, created the perfect squeeze around her cock. To relieve the lust that had built up while she slept, Lua began moving her hips faster and faster.
Plap! Plap!
“It’s coming…! Khh…♥”
“Mmm…♡”
Lost in the rising urge to climax, Lua thrust forward as hard as she could. The force was enough to bend Sia’s waist into a bow; her body creaked in protest.
Spurrrrrt—
“Khhhu…♥”
“Uuh…♡”
The moment Lua began to ejaculate, her massive cock throbbed and twitched, relentlessly stimulating Sia’s pussy. Her lower belly clenched, her folds tingling madly. Spurrrrrt—
“Ah…♥”
Lua’s orgasm lasted far longer than any normal man’s. Drunk on pleasure so intense it numbed her mind, she could only wear a foolish, blissful expression as she kept pumping out thick ropes of semen. The flood soaked the sheets, the wet patch spreading until it reached the spot where Sia lay. The heavy, musky scent of a male in rut filled Sia’s nose.
Her lower belly throbbed harder and harder.
Spurt—
“Ahn…! Haa… haa…♥”
Having finished, Lua let out a refreshed sigh and savored the afterglow. Sia felt the hot, rigid thing between her thighs shrinking rapidly.
“Thank you, Brother. I should be fine for a while now.”
“J-just once… is enough?”
“Yes. Last night you… you made me cum so much.”
A strange sense of disappointment washed over Sia. If Lua had been satisfied, that should have been enough. Yet even as she thought it, Sia felt deeply unsatisfied.
“You should sleep a little longer, Brother.”
“Mmm…”
Sia felt Lua slip out of bed behind her. The Grand Duke’s day began far earlier than Sia’s, who had no official duties.
“Ah, it would be better if you moved to your own bed. This one’s gotten dirty. The smell is quite strong…”
“I-I’ll do that.”
“The physician will come and clean it with magic. We can’t let the maids notice.”
“Mm.”
While Sia rose with slow, sluggish movements, Lua—far more energetic—had already left the room. Once she confirmed Lua was gone, Sia lay back down, pulled the covers over her head, and breathed in deeply.
“Haa… haa… haaah…♡”
The sheets were saturated with the scent of Lua’s thick semen. Every time Sia inhaled it, her brain seemed to release waves of blissful chemicals. This smell was proof of her little sister’s affection, wrapping around every secret corner of her body and soaking into her very core.
“I-I can’t hold it anymore…♡”
Her body burned. Before Lua had fallen into her abnormal state, Sia had never felt sexual desire, let alone touched herself. But thanks to Lua’s wicked games yesterday, she had learned exactly how good a female orgasm could feel. She now knew she could relieve this maddening itch by bringing herself to climax as a woman.
“That’s… that’s not fair, Lua… leaving me like this and running off…! Hnn…♡”
Before, she had simply waited for the feeling to subside. But now that she knew an easy, wonderful solution existed, there was no reason to endure it.
That small, protruding nub hidden in her most secret place—what had it been called? The clitoris? The female counterpart to the glans she had possessed as a man. Sia slipped her fingers inside her panties and began to rub it gently.
“Hah…!♡”
The sensation was electric. All the pent-up pleasure crashed over her at once. Her head fell back, drool gathering at the corner of her mouth. She could barely breathe. It felt far more sensitive than the glans she had known as a man. Was it because the nerves were so densely packed into such a tiny area?
Sia never noticed the pink hearts floating in her own pupils.
Her fingers moved faster and faster, frantic.
Squish-squish-squish-squish-squish—
“Hnn… haaaah?!♡”
She had barely been touching herself for any time at all before an overwhelming pleasure that threatened to paralyze her brain surged through her. Clear fluid gushed out in rhythmic spurts. This sensation deserved the word climax far more than anything she had felt as a man. The sheer, uncontrollable ecstasy made her slender toes curl tightly.
“Haa… haa…♡”
Drunk on happiness, Sia lay trembling for a long time, savoring the afterglow. Only when she finally thought to return to her own bed and lifted her head did her heart nearly stop.
She was not alone in the Grand Duke’s chamber.
Standing at the door was Dimaria, the court physician, wearing an extremely awkward expression.
“…You saw that, didn’t you?”
“…Saw what, exactly?”
Her gaze refused to meet Sia’s directly. Her answer came a fraction too late. Sia was certain Dimaria had witnessed her squirting in climax.
“U-uwaaaaah! Y-y-you saw it, didn’t yoooou?!”
“L-Lady Sia! Please calm down! I truly saw nothing!”
She had been forced to wake far earlier than usual. The moment she entered, the thick scent of male seed had assaulted her with filthy urges. Yet Dimaria held no resentment.
Her only concern was the person curled up inside that pink bundle of fur on the bed.
“Lady Sia. His Highness’s bed has been cleaned.”
“…Yes.”
“…Lady Sia. I was wrong. Please don’t be angry with me.”
“…I’m not angry.”
Dimaria had naturally assumed Sia would still be asleep. She had been told she could enter without permission, and the royal guards had opened the door at once. Unfortunately, Sia had not been sleeping—she had been engaged in an entirely different activity.
“Lady Sia.”
“Have I… have I really become a woman?”
“…”
“I know the truth. I know I’ve become a woman. I just… didn’t want to accept it.”
Her voice was thick with tears. Dimaria could only offer logical comfort, yet she spoke with complete sincerity.
“Now I don’t even know anymore. When I see it, I get excited like a woman. When I touch myself there, I climax like a woman… and it doesn’t even feel strange to me anymore.”
“Lady Sia…”
“My body has changed. If my heart has changed too, then… am I still me? Has the person I used to be… simply disappeared?”
“…”
“Before, I thought it would be fine if someone like me disappeared. I was useless. But now that it’s actually happening, I understand. I don’t want to disappear… uuu…”
The pink bundle of fur trembled pitifully as it let out a sorrowful cry. Dimaria took a slow, deep breath, then bowed deeply toward Sia. Her long hair hid her face, but her voice was steady.
“Lady Sia. I am sorry. This is all my fault.”
“Uuu…? It’s not your fault, Dimaria…”
“It is. It is entirely my fault. If I had not suggested a way to transfer the curse that day, none of this would have happened to you.”
“Uuuu… but… if you hadn’t, Lua would have been in danger…”
“Regardless, I made the choice that led to your current state. I will bear that responsibility to the end. Therefore… may I examine you now?”
“Uuu…”
The top of the pink bundle shifted. Dimaria recognized the nod and approached the bed. She gently brushed aside Sia’s hair and cupped her cheeks with both hands, slowly lifting her face.
“Ugh…”
Still embarrassed, Sia’s eyes darted away, refusing to meet Dimaria’s gaze.
I definitely felt the curse’s energy earlier. Sexual desire itself shouldn’t be caused by the curse, yet…
Dimaria had not simply been staring out of shock. She had sensed the curse actively fueling Sia’s lust—something different from last time. Though she could not see them now, she had clearly witnessed the heart shapes forming in Sia’s eyes moments ago. That too was undoubtedly a symptom of the curse.
“Lady Sia.”
“Yes?”
“How exactly did you spend last night with Her Highness Lua?”
“Umm…?”
Sia blinked, confused by the question. Then the memories returned, and a deep blush spread across her face.
“W-we spent it… rather intensely…? Hnn♡”
As she recalled the sight of Lua ravishing her, Sia felt her lower belly throb again. Her expression melted into one of pure lust, fresh hearts beginning to bloom in her eyes. The foul energy of the curse boiled up from within her body.
Dimaria was now certain: Sia’s unique constitution had created yet another new curse.