Takashi Ichinose's POV
After witnessing for myself that the system's power actually worked and I gained Incest Normality, I knew I had to test it further.
Sure, I could've just asked the system directly for an explanation, but I wasn't the type to become dependent on someone, or something, to hold my hand through every step.
Relying on others for every plan or letting them do all the work only turns a man soft.
Even if I now possessed a reality-warping ability that let me reshape the world through breeding girls, that didn't mean I was about to abandon my own intelligence or stop working hard.
The world might bow down to talent and genius, but it's hard work that sharpens the blade, keeps the edge, and ensures survival.
So I began my experiment in the most direct way possible by making love to my sister in her room.
Her body clung to mine, her moans spilling louder than usual, and I didn't stop her.
In fact, I pushed her to cry out harder, making sure her voice leaked faintly beyond the walls, just enough for the family to possibly hear.
A subtle yet dangerous test of how far this power stretched.
My cock drove in and out of her slippery, soaking pussy, each thrust burying me deeper as her walls gripped me tightly.
She wrapped her arms around me like she never wanted to let go, squeezing me close with every orgasm we shared.
Her body shook with pleasure, but even in exhaustion she held firm, making sure not a single drop of my cum spilled out, swallowing every load deep into her womb until she was panting breathlessly against me.
"Brother… you're so much rougher than usual," she gasped out between cries of pleasure. "I-I can't hold back my voice… What if your girlfriend hears us? What if she finds out?"
There was genuine worry hidden in her tone. "Usually… usually you'd kiss me to keep me quiet."
Her words caught my attention, and I couldn't help but find it intriguing. It wasn't the incest that bothered her. No, what she feared more was the possibility of being caught as if we were cheating. The idea of our forbidden blood bond being exposed didn't even register to her as something shameful.
"Don't you think it's more dangerous if people found out we're siblings fucking each other?" I asked, narrowing my eyes, deliberately testing just how far this Incest Normality ability could go.
But she only looked at me strangely, as if I had said something odd. Her eyes narrowed slightly, confusion lacing her features.
"Why would you think that, brother?" she answered in a matter-of-fact tone. "There's nothing strange about it. I think it's perfectly normal."
A smirk tugged at my lips. That answer told me everything. If incest with my sister was truly seen as normal, then the possibilities were endless. I could take things even further, even bolder.
"Get on all fours, Honami," I ordered firmly, my voice dripping with lust. "I want to fuck you from behind."
She didn't even hesitate. Without a word, she turned around, dropped onto her hands and knees, and lifted her ass high for me, presenting herself completely.
The sight alone was intoxicating.
I wasted no time, pressing my throbbing erection against her slick entrance before slamming myself back inside her.
Her body jolted forward with the force, her pussy clenching around me like it wanted to milk me dry.
I grabbed her waist, pounding her in a relentless rhythm, my hips slapping against her ass with each thrust.
I raised my hand and brought it down on her soft, bouncing cheeks, spanking her hard enough to make her cry out, her moans muffled only by the pillow she buried her face into.
Every bounce of her ass against my cock only drove me crazier.
Time blurred into raw lust.
We kept fucking throughout the night, our bodies slick with sweat, the sheets ruined beneath us.
I came inside her again and again, and every time she squeezed tighter, pulling me deeper, as if her womb refused to let me go.
By the time the dawn light crept into the room and the smell of breakfast drifted from the kitchen, we were still locked together, tangled in the mess of our sin made normal, her body trembling with exhaustion but her ass still raised for me, begging for more.
However, we didn't linger long in the bedroom. Instead, we moved into the shower together, our bodies pressed against each other under the hot stream of water.
There, we had a quick, sloppy fuck, her moans echoing off the tiles as I pinned her against the wall, before finally washing ourselves clean and getting dressed as if nothing had happened.
When we entered the breakfast room, the atmosphere felt heavier than usual.
We ate slowly, savoring the food, but every bite carried a kind of silent tension.
Cheating might have been considered wrong in anyone's eyes, but incest… incest was supposed to be unforgivable. It should have raised questions, it should have drawn judgment.
Yet our mother, who surely noticed the closeness, only cast us a passing glance. She said nothing, as if to her, incest was perfectly normal, while cheating was the real sin.
That silent a twisted acceptance, made a grin spread across my face.
Once breakfast ended and the rest of the family left the table, I turned my eyes toward Honami.
No matter how much I had sex with her, it never felt enough.
She noticed my stare, her cheeks pinking slightly as she shifted nervously.
"Brother," she whispered, "what about your girlfriend?"
"She already knows," I replied flatly, wasting no more breath.
My hand shot out, gripping her chin, and I crashed my lips against hers. My kiss was hungry, desperate, dripping with lust.
She resisted at first, trembling at the thought of being discovered, her hands pressing weakly against my chest as though to push me away.
But my grip was too strong, too possessive, and the resistance melted fast.
I squeezed her heavy breasts through her clothes, kneading them until she gasped, her lips parting.
My fingers worked quickly, unbuttoning her shirt, baring her pale skin before tossing her navy-blue bra onto the floor.
Her full breasts spilled free, and I latched onto one nipple immediately, sucking hard.
"Brother… y-yes… keep sucking, brother…" she moaned, her fingers sliding into my blonde hair, stroking it gently as if encouraging me to drink from her body.
I sucked in harder, my tongue swirling around her hardened peak while my hand kneaded the other breast, leaving her chest slick and shining with my saliva.
She writhed beneath my touch, her breathing ragged and broken.
But patience was never my strength.
My cock was already throbbing, aching to be inside her, and I couldn't wait any longer.
I shoved down my trousers, my shaft springing free, while Honami spread her legs shamelessly right there on the breakfast table.
She leaned back, offering herself completely, her pussy glistening wet and ready for me.
I grinned wickedly, positioning myself at her entrance. "Thanks for the breakfast, Honami-chan."
She returned my grin with a flushed smile, her arms wrapping tightly around me.
"Eat me as much as you want, brother," she whispered breathlessly.
I thrust into her in one stroke, her wet walls clenching around me, and she cried out as I began to move, pounding her without hesitation.
The table creaked under our rhythm as her arms and legs locked around me, pulling me deeper inside her.
Every thrust, every moan, every kiss, only proved it further, the experiment was complete.
Incest Normality had taken root.
In our family's twisted reality, the true taboo wasn't that I was fucking my sister.
The only crime that mattered was cheating.
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