Another three years passed.
Deep underground at Capsule Corporation, inside the newest Gravity Room, the walls were built from Katchin Steel—one of the hardest materials in the universe.
The console displayed a bright red number:
3G
Under gravity powerful enough to flatten a tank, a tiny figure just over a meter tall walked steadily forward, step by step.
He wore a miniature black nano battle suit. Beneath his short black hair, his eyes held a calm confidence far beyond his age.
He was Trunks, the four-year-old son of Krillin and Bulma.
"Zero, bring me my juice. Cold."
Trunks stopped walking and casually gave the order to a domestic robot trembling in the corner.
"W-Warning… Under three times gravity… structural systems unable to maintain stability…"
The robot spoke with distorted electronic beeps.
Trunks curled his lips in a mischievous smile identical to Krillin's.
"Useless."
With a small wave of his hand, an invisible strand of Qi lifted a juice glass from a nearby table and floated it directly into his hand.
He drank it in one gulp.
Then he tossed the empty glass aside.
A small burst of Qi shot from his fingers.
Pop!
The glass shattered into dust in midair.
"Clean that up," Trunks said calmly before continuing his gravity training.
This child had perfectly inherited Krillin's mischievous personality, Bulma's intelligence, and the terrifying confidence produced by combining both.
Just then, the Gravity Room door opened.
Krillin walked in.
"Daddy!"
Trunks immediately broke into a bright smile and ran toward him.
Krillin casually lowered the gravity back to normal and lifted his son into his arms.
"Training's over for today," he said. "We have guests."
"Guests?" Trunks' eyes lit up. "Is there food?"
"Yes," Krillin replied with a laugh. "And there's a kid about your age too."
Capsule Corporation – Living Room
When they arrived upstairs, they saw Son Goku sitting on the sofa happily devouring a giant fruit platter.
Behind him stood a small boy wearing a neat suit with a bowl haircut.
He hid timidly behind Goku and peeked around nervously.
It was Gohan, the four-year-old son of Goku and Chi-Chi.
"Hey, Goku! Long time no see," Krillin greeted.
"Krillin!" Goku immediately jumped up and hugged him enthusiastically.
"Your kid's already this big! He looks strong! Where's Master Roshi? I didn't see him."
"Probably at the beach again," Krillin replied casually.
Bulma came over as well and warmly welcomed Chi-Chi, pulling her into conversation.
While the adults talked, the two children stared at each other.
Trunks crossed his arms like a small boss and examined Gohan carefully.
The boy in front of him looked timid and quiet.
Although Gohan had noticeable Qi, it was scattered and untrained.
Gohan felt uncomfortable under Trunks' gaze and gripped Goku's pants nervously.
"Hey," Trunks said bluntly. "What's your name?"
"I… I'm Gohan…" His voice was barely audible.
"Gohan?" Trunks tilted his head.
"My name is Trunks. Want to fight?"
"Ah?!" Gohan panicked and waved his hands.
"N-No! Mommy said fighting is wrong. I should be a polite and good child."
Trunks immediately showed a look of complete disdain.
"My dad says a man who can't fight is useless."
"I—I'm not useless!" Gohan protested weakly, his eyes beginning to turn red.
The adults noticed the tension.
Chi-Chi immediately stood up, but Bulma gently stopped her.
"Let the kids handle it," Bulma said with a smile.
Her eyes gleamed with interest.
She had absolute confidence in her son.
Krillin also watched with curiosity.
He wanted to see what would happen when these two children with limitless potential met for the first time.
"Not useless? Then prove it!"
Before Gohan could respond, Trunks vanished.
The speed stunned everyone except Krillin and Goku.
Trunks wasn't even using Qi.
He was relying purely on the physical power inherited from the Saitama Template.
To Gohan, it looked like a black blur rushing toward him.
His Saiyan instincts reacted immediately.
He stepped sideways just in time to dodge.
"Oh?" Trunks said, surprised. "You can dodge."
He attacked again.
His tiny fists cut through the air with incredible speed.
Every strike was simple but extremely precise.
Gohan panicked, dodging clumsily—rolling, jumping, stumbling.
He had no technique at all.
Yet somehow he avoided every attack by pure instinct.
His Saiyan bloodline was awakening under pressure.
Trunks grew impatient.
Suddenly he accelerated and appeared in Gohan's blind spot.
Thud.
A quick chop landed on the back of Gohan's neck.
Gohan collapsed onto the floor.
He wasn't hurt—just stunned.
Lying there, he saw everyone watching him.
Then he looked at Trunks standing proudly like a victor.
Humiliation and frustration surged through him.
"Waaaaaah!" Gohan burst into tears.
But at the same time—
A massive Qi suddenly exploded from his body.
The energy surged outward like a shockwave.
Carpets and decorations in the living room were blown aside.
Trunks, standing closest, was pushed back one step.
He steadied himself and stared at Gohan with wide eyes.
Instead of fear, his face lit up with excitement.
"Hey! So you're not just a crying coward!" Trunks grinned as his own aura began to rise.
"Now this is interesting!"
In the living room of Capsule Corporation, two four-year-old children released terrifying potential that could make most martial artists on Earth despair.
Goku scratched his head happily.
"Wow! Gohan's amazing! Krillin, your kid is super strong too!"
Krillin watched the scene quietly.
His gaze lingered on Gohan, who stood up while still crying but had already taken a defensive stance.
Krillin's eyes became thoughtful.
The future of Earth… was standing right here.
...
Author's Note:
Dragon Ball: Reborn as Krillin, One Punch to Crush Saiyan's — Part 1 is now fully completed, with more than 80+ chapters available on my Patreon!
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1. Dragon Ball: Oolong's Sex Adventure
2. Elements of Lust – ATLA & Korra Mixed Smut
3. Doraemon: Filtering with Nobi Tamako
4. The Naive Me Who Became Someone's Everyday Secret
5. High School DxD: Rias Gremory, the Phenex Bride
6. Versatile Mage: Awakening the Succubus System
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