A month had passed since Ren's "unfortunate" encounter with Truck-kun and his subsequent birth into the most volatile family in history.
To the Uchiha clan, he was still just the "third son"—the quiet, oddly intense baby who barely cried. But inside that tiny, swaddled body was the mind of a modern teenager fueled by the knowledge of a dozen fictional worlds and a bank account that would make a Daimyo weep.
[Current Balance: 1,000,000 System Coins][Nightly Training Report: 30 Shadow Clones dispersed.][Skills Leveled: Basic Sensory (Lvl 15), Chakra Control (Lvl 20), Shurikenjutsu Theory (Lvl 10)]
Being a baby is boring, Ren thought, staring blankly at the wooden mobile hanging above his crib. But being a baby with a million coins? That's just unfair.
Every night, when the lanterns dimmed and the Uchiha compound settled into a tense silence, Ren's training began.
Poof.
A miniature Shadow Clone appeared in the shadows of the nursery. It was a strange sight—a tiny infant-sized clone sitting cross-legged, wearing a miniature tactical headset bought from the Multiverse Shop. While the "Original" Ren slept to ensure his physical growth wasn't stunted, the clone was busy.
"System," Ren mentally commanded. "Open the 'Bloodline & Genetics' tab."
The screen flickered.
[Pure Senju Vitality Serum] — 500,000 Coins.
[Perfect Sharingan Stabilization Catalyst] — 200,000 Coins.
[Hashirama's Wood Release (Mokuton) DNA Sample] — 1,000,000 Coins.
Ren looked at the Mokuton sample. If he bought it now, he could integrate it before his own chakra coils fully matured. He would be the first Uchiha in history to possess the legendary Wood Release.
Wait... if I buy that, the 10x Rebate will give me 10,000,000 coins.
Ren didn't hesitate. Buy the Mokuton DNA.
[Transaction Successful! 1,000,000 Coins spent.][10x Rebate Triggered! 10,000,000 System Coins credited!][Warning: Integration will cause a slight fever. Proceed?]
Do it.
The next morning, Ren's room was a flurry of activity. His mother, her face pale with worry, pressed a cool cloth to his forehead. Ren's body was burning up as the Senju DNA re-coded his Uchiha cells, creating a perfect balance of Yin and Yang.
"He's too hot," she whispered. "Tajima, we need a healer."
Tajima Uchiha stood by the door, his hand resting on the hilt of his katana. His eyes were cold. "Healers are for those who can be saved. If he dies from a simple fever, he was never meant to survive this era."
A five-year-old Madara pushed past his father's legs, his face a mask of stubborn defiance. "He's not going to die, Father! He's an Uchiha. He's my brother."
Little Izuna, barely standing on his own, gripped the edge of the crib, his eyes watering. "Ren... wake up. I'll give you my favorite wooden kunai if you wake up."
Ren, drifting in and out of consciousness, felt a surge of warmth—not from the fever, but from the raw protectiveness of his older brothers. He looked at Madara's spiky hair and Izuna's tear-filled eyes.
By evening, the fever broke. But Ren was different. When he opened his eyes, they weren't just dark; they had a hidden depth, a faint emerald shimmer that vanished in a heartbeat.
His chakra reserves had tripled. His skin felt like iron. And deep within his mind, he felt a connection to the very wood of the house he was in.
"The fever is gone," the midwife announced, amazed. "It's a miracle."
Tajima grunted, unimpressed, and left the room. But Madara stayed behind, watching Ren with an intense curiosity.
"You're weird, Ren," Madara whispered, poking Ren's cheek. "You feel... stronger. Like a mountain."
Ren grabbed Madara's finger with a grip that was far too strong for a one-month-old. He looked his brother in the eye and gave a tiny, toothless smirk.
Ren opens the Multiverse Shop, his mental cursor hovering over the "Advanced Training" tab. He has 10,000,000 Coins and a burning desire to turn his brothers into the ultimate powerhouses of this era.
The Buy: [Gravity Training Room (Capsule Corp - Portable Version)] — Cost: 5,000,000 Coins.
Effect: A small, capsule-based room that can simulate up to 100x Earth's gravity. It comes with its own oxygen supply and medical bay.
The Buy: [Senzu Bean Seeds (Modified for Earth Soil)] — Cost: 5,000,000 Coins.
Effect: Allows Ren to grow his own supply of instant-healing beans, ensuring no training injury is permanent.
The Rebate: The System screen pulses with a blinding, diamond-like radiance:"Transaction Confirmed! 10,000,000 Coins spent.
10x Rebate Triggered... 100,000,000 System Coins credited!"
Ren is now a System Billionaire. At this rate, he could buy the entire Land of Fire and turn it into a private theme park if he wanted to.
Ren is now six months old. He can crawl with the speed of a professional athlete, and his grip can crush solid stone, though he hides it behind a facade of "baby clumsiness."
One evening, while Tajima is away at a border skirmish, Ren crawls into the training yard where Madara and Izuna are panting, exhausted from a day of traditional shuriken practice.
"Brothers... come here," Ren transmits mentally, using a [Telepathy Skill] he bought for a few thousand coins.
Madara jumps, his head whipping around. "Who said that? Izuna, did you hear that?"
Izuna looks confused. "It sounded like... the baby?"
Ren crawls behind a large storage shed and taps a small, silver capsule on the ground. Poof. A sleek, metallic dome—the Gravity Room—expands silently, hidden from the rest of the compound by a [Stealth Field].
Ren looks at his brothers and gestures for them to enter.
Madara and Izuna step inside, their mouths hanging open at the futuristic white walls and glowing control panels. The moment the door hisses shut, Ren—who is now standing upright with the balance of a master—taps a button on the wall.
[Gravity: 2x Earth Normal]
Madara and Izuna both stumble, their knees buckling as their body weight suddenly doubles.
"What... is this?" Madara gasps, his eyes wide with a mixture of fear and excitement. "My body... it feels like it's made of lead!"
"This is how we win," Ren's voice echoes in their minds. "Train here for one hour every night. In one month, the Senju won't even be able to see your movements."
Ren then pulls out two small, green beans. "Eat these if you feel your bones cracking. They're called Senzu beans. They heal everything."
Madara looks at his infant brother, finally realizing that the "runt" was actually the most dangerous entity in their clan. A wild, competitive grin spreads across Madara's face—the same grin that would one day terrify the Shinobi Alliance.
"I don't know how you're doing this, Ren," Madara says, standing up against the 2x gravity with sheer willpower. "But if you're providing the tools... I'll become the strongest ninja this world has ever seen."