The Otherworld
"Waaah, waaah."
When I opened my eyes, I found my body had become a tiny, squirming lump of flesh. My limbs wouldn't move the way I wanted, and all that came out of my mouth were pathetic, infantile gurgles.
'Damn it, I really have to start from infancy.'
But my annoyance soon turned into a smirk. It was because of the sight unfolding before my eyes.
"Oh, my, my, my... our Master... no, our little son. Are you awake?"
Gaia stood there, her dazzling silver hair pinned up, her explosive breasts barely contained by a tight apron. The former Supreme Deity of the universe was currently grinning like an idiot, shaking a rattle in front of my cradle.
We were in a grand mansion deep in the forest, on the outskirts of a massive empire's capital. The moment she crossed over to this otherworld, Gaia had used her divine power to construct this luxurious estate in the heart of the woods. She then established herself as a "reclusive widow" with immense wealth, becoming my perfect wet nurse and mother.
"Master, it's time for your meal. Come now, have some of Gaia's milk..."
Gaia lifted her apron and offered her massive breasts. Whether it was the instinct of a baby or the lingering male instinct from my past life, I naturally latched onto that large nipple and sucked with all my might.
Slurp, sluuurp.
"Ah, aah...! Haaah...!"

As I began to nurse, Gaia's galaxy-like eyes instantly rolled back into her head. She twisted her legs, rubbing her thighs together.
"M-Master is... with a newborn's lips... caressing Gaia's nipple...! Ah, aah... I'm getting wet down there again..."
'Ha, this bitch. She's already in heat just from one feeding.'
I gurgled, and with my tiny baby hand, I purposefully pinched her other nipple.
"Hiiik! N-no, Master! If you pinch like that... haa, haa...!"
Gaia gasped, pressing her burning cheek against mine.
"Gaia's hole is already throbbing...! I want to accept Master's massive cock right now... but to think I have to wait until you're an adult... haa, I think I'm going to go insane...!"
The perfect Common Sense Rewriting I had set in place:
Because of this absolute truth, the horny Supreme Deity had to endure a life of insane, ascetic parenting, suppressing the urge to be mounted by me at any moment.
I chuckled to myself and sucked even harder.
'Try holding it in for twenty years, you'll feel the burn.'
That was when it happened. The mansion door opened, and one of the maids Gaia employed walked in, carrying a bundle.
"My Lady, as you instructed, I have brought the child abandoned at the orphanage on the outskirts of the Empire."
"Ah, good work. Give her here."
Gaia held me with one arm and took the bundle with the other. Inside, a black-haired baby girl, just as newborn as I was, lay fast asleep.
"Master, look. I peeked at the laws of this world, and it says this child is the future Hero who will defeat the Demon King. As you commanded, I picked the one with the most potential."
'Oh, you brought her already.'
I stared intently at the black-haired baby with my infant eyes. Gaia grinned and poked the baby's cheek.
"From now on, this girl will be raised as your childhood friend and a future toilet. I'll change her dirty diapers myself, and I'll secretly brainwash her from a young age, teaching her that 'sacrificing your life and spreading your legs for your childhood friend Sang-gun is the reason for your existence.'"
'A truly excellent bitch. She gets things done.'
I smiled in satisfaction and burrowed back into Gaia's arms. Thus, the dizzying and bizarre life in the forest mansion began—the horny goddess, the infant who would become the Hero, and me.
Time flowed relentlessly. Growing from a baby to walking, running, and mimicking swordsmanship and magic wasn't as boring as I thought. During the day, Gaia acted as the elegant and refined mistress of the mansion and a perfect mother. But at night, or whenever we were alone, she would turn into a panting bitch, grabbing my pant legs and weeping.
"Master... please, just fuck me... I feel like I'm going to die from the itch down there..."
"Wait. You're not an adult yet."
"Aaaah! When will you grow up...! Fifteen is old enough to copulate in this world...!"
Because I had set the rules not to the laws of this world, but to "20 years old, the adult standard of Earth," Gaia's tearful abstinence knew no end. She barely managed to survive by licking my socks or masturbating while hugging my worn-out underwear.
In the meantime, the black-haired Hero, Aria, who grew up alongside me, also blossomed into a stunning beauty.
"Sang-gun! Won't you practice swordsmanship with me today?"
With a smile as bright as sunshine and a body that was both toned and perfectly curved, Aria grew up harboring the seeds of a blind bitch. Thanks to Gaia's subtle and persistent brainwashing, she acted like a casual childhood friend who played with me, but whenever she saw me, she would unconsciously blush and wag her tail.
But I had a different goal in mind.
'Those long, sweet twenty years... have finally passed.'
On the morning of my twentieth birthday, I stood before the mirror, admiring my perfect adult body with its broad shoulders and solid muscles.
Click.
My bedroom door opened cautiously. Standing there was Gaia, not in her elegant mistress attire, but in a lewd, revealing maid outfit that left nothing to the imagination.
"...M-Master."
Gaia's galaxy-like eyes were trembling. Her gaze was fixed firmly on the massive, throbbing center between my legs, unable to look away. Through the transparent fabric, the juices she had suppressed for twenty years were dripping down, soaking the carpet.

I sat on the edge of the bed and slowly crossed my legs.
"Gaia."
"Y-yes...! M-Master... ah, my perfect Master who has reached adulthood...!"
Gaia crawled across the floor like a beast and kissed my feet. Her face was already a mess of tears and pleasure.
"Twenty years. It was long, wasn't it?"
"Hnnng... I-I thought I was going to go insane...! Watching you grow every night... thinking about when that cock would tear my hole open... I survived twenty years just thinking about that...!"
"You worked hard changing diapers, nursing me, and taking my tantrums."
I gently grabbed the hair of the Supreme Deity panting at my feet.
"As promised, the time has come for the reward for raising me."
"A, aaaah...! R-reward...! Copulation reward...!"
Gaia's eyes rolled back completely. She tore off her own panties and spread her dripping, intimate parts wide open with both hands.
"Give it to me! Please, give it to me! Insert Sang-gun Master's massive cock into Gaia's hole! Spray all twenty years of suppressed semen into my womb!"
It was the moment twenty years of pent-up heat exploded. I grinned, unzipped my pants, and pulled out my stiff, massive center, thrusting it right in front of Gaia's face.
"Now, suck the cock you raised. I'll teach you everything one by one, Gaia."
"Ah, aah...! Y-yes...! Our Master's cock that Gaia raised so beautifully...!"
Gaia cupped my shaft with both hands, her expression reverent. It was the moment the Supreme Deity, who had been wiping my bottom and waiting anxiously since I was a bloody newborn twenty years ago, finally faced the perfectly matured tool of a male.

"Slurp, slurp... haa, it's too big... it won't all fit in one mouth..."
"Didn't I tell you to use your tongue before your teeth? You haven't forgotten the basic common sense I taught you in that white space twenty years ago, have you?"
"I-I haven't forgotten...! I'll lick it, I'll lick it like a beast...! Slurp, suck, slurp...!"
Gaia stuck out her long tongue and began to greedily lick from the tip of the glans to the base of the shaft. The sound of wet saliva filled the room. A thrilling pleasure surged up my spine at the blind caress filled with twenty years of thirst.
I smiled contentedly, stroking Gaia's silver hair as she greedily sucked on my center, before gently pulling her away.
"Well done, Gaia. Now, lie down, spread your pussy, and beg."
"Ah, aah...! Y-yes...!"
Gaia hurriedly wiped her lips and flopped onto the bed, panting. She spread her white thighs wide open, exposing her intimate parts—soaked in juices from never having been penetrated in twenty years—right before my eyes.
"M-Master... please... please insert Sang-gun Master's massive cock into Gaia's pussy...! Spray twenty years of suppressed semen into this bitch's womb!"
Gaia shouted in a heated voice, digging her fingers into her wet crevice.
Squish, squelch!
"Haa, haang...! L-look, Master...! My pussy is already throbbing like crazy because it wants to eat your cock...!"
"Right. I'll put it in."
I positioned myself between Gaia's spread legs and thrust my hips in, penetrating that soaked, wet place in one go.
Thwack!
"Aaaaaaah---!!"
The narrow, hot inner walls that had been closed for twenty years were helplessly pierced by the massive sensation. It was the perfect sensation of a bitch, where even the tearing pain transformed into overwhelming pleasure that melted the brain.
Thwack! Thwack! Squish!
"Haang! Aang! M-Master! Your cock, I love your cock so much! My pussy is tearing apart!"
I grabbed Gaia's pelvis as she panted like an animal and thrust mercilessly. And finally, at the moment I reached my limit, I poured twenty years' worth of hot semen into the deepest part of her womb.
"Aaaaaaah! It's, it's coming!! Master's semen, it's filling up Gaia's womb!!"
Splurt!
"Haa... haa..."
The white semen ejaculated deep inside her gushed out, dripping down Gaia's trembling thighs. It was the moment the twenty-year-old heat of the bitch who was the Supreme Deity and my nurse was perfectly satisfied by the ultimate copulation.