On the seashore.
Garp had returned to Luffy's side, and at this moment, he was grinning, hands on his hips, and laughing proudly.
"How about it, Luffy? Isn't my move amazing?"
"If you agree to become a Marine with me, I'll teach you this move!"
Luffy did not answer immediately, but walked to the shore, faced the sea, and then slowly said.
"Let me try first."
As he spoke, Luffy clenched his fist and gathered energy.
In an instant, boundless energy also began to surge out from his body.
Substantial purplish-black lightning tore through the air, gathering between his fist and the world, covering nearly a hundred meters.
Immediately after, Luffy unleashed a punch in mid-air.
The terrifying energy roared and screamed, and the lightning, wrapped in airwaves, formed a transparent purplish-black electric sphere.
The electric sphere exploded violently, and a magnificent shockwave, like a cannonball leaving a barrel, blasted out from the sea surface.
Instantly, wherever the shockwave passed, the seawater frantically poured to both sides.
Finally, it left a huge trench several meters deep and hundreds of meters long on the sea surface.
Luffy was very satisfied with the destructive power he caused.
His current Haki was not a little bit different from Garp's, and being able to achieve this level was already extremely outstanding.
Garp was also extremely satisfied with Luffy's performance, nodding repeatedly, and continued to say proudly.
"Now you've seen how powerful my move is, haven't you?"
"Haoshoku Haki Infusion is a unique technique that only a very small number of people possess."
"As long as you come back to Marineford with me, I guarantee I'll teach you this move!"
Luffy said nothing, just turned around and stared quietly at Garp.
Garp was immersed in the fantasy of devil training Luffy, when he suddenly froze in place as if electrocuted.
For a moment, the air became incredibly quiet.
"Ah…"
The next second, Garp held his head in his hands, his jaw dropped to the ground, and his eyeballs popped out, as if he had seen a ghost, looking at Luffy and shouting in disbelief.
Although Uta was not as exaggerated as Garp, she was also shocked by Luffy's heaven-defying learning ability.
He learned it just by watching once. This talent was terrifying.
...
Although Luffy instantly mastered Haoshoku Haki Infusion through his heaven-defying comprehension, there was still a big difference between actual combat application and casting skills out of thin air.
So Luffy once again squeezed Garp, wanting him to be his sparring partner.
"Old man, let's have a fight!"
He deliberately called Garp an old man, just to make Garp fight him.
Sure enough, Garp was immediately enraged by Luffy's disrespectful tone, and instantly bared his teeth, rolled up his sleeves, and said angrily.
"You idiot, I think you've forgotten the power of Grandpa's iron fist."
Garp, of course, knew Luffy's little trick, but he didn't expose it.
This might be one of the few things he could do for Luffy, so he might as well be a good sparring partner.
...
"Your comprehension is heaven-defying. Through personal combat experience, your Armament Haki has been enhanced."
"Your comprehension is heaven-defying. Through personal combat experience, your Observation Haki has been enhanced."
"Your comprehension is heaven-defying. Through personal combat experience, your spirit has been enhanced."
"Your spirit has been enhanced, and your Haoshoku Haki has been strengthened."
...
Time flew by, and when the three left the island, it was two months later.
During these two months, Luffy's life consisted of eating, sleeping, and getting beaten up.
However, although he was beaten every day, Luffy was happy every day.
His strength had surged during this period, even more than his own two years of solitary training.
This also had a lot to do with his sparring partner.
As a top powerhouse in this world, fighting with someone of this level naturally yielded far greater rewards than other methods.
Moreover, Garp possessed Haoshoku Haki, and Luffy also discovered that when fighting opponents with Haoshoku Haki, his Haoshoku Haki would also be enhanced due to his heaven-defying comprehension.
As a result, his current Haoshoku Haki strength has more than doubled.
And in terms of physical fitness, he also gained a lot.
Even his Eight Gates, he successfully broke through during this period and could open up to the sixth gate.
Luffy was confident that his current strength was enough to go to sea, and he even surpassed the Colonels that Garp sometimes brought from Marineford.
If he were to activate the Eight Gates again, he could even fight against some weaker Commodores.
However, training to this extent was the limit.
Garp, after all, had a mission, and being able to spare time to train him for two months was already the maximum.
...
Returning to Windmill Village, Garp did not let Luffy stay in the village anymore.
Instead, he took him and Uta to Mount Colubo, deep in the forest behind the village.
Dong! Dong! Dong!
A wooden house on top of Mount Colubo was being knocked incessantly.
"You're so noisy! Who the hell is so reckless?!"
A woman with orange hair and a stout build rushed out of the wooden house, smoking a cigarette and roaring impatiently.
Luffy also knew this person, who was Dadan, the mountain bandit who raised him and Ace in the original story.
"It's me!"
Garp responded indifferently.
Seeing who it was, Dadan was instantly scared and retreated repeatedly, with a long string of snot hanging down, exclaiming.
"Mr. Garp!!!"
"You look quite energetic, don't you?"
"Don't joke around, I beg you to spare us! Ace is already 10 years old."
Hearing Dadan mention Ace, Garp immediately became interested.
"Really? He's grown so big! How is he doing?"
At this moment, another mountain bandit who heard the commotion and rushed over complained.
"We're almost at our wits' end with him, please take him back!"
Garp ignored the complaining mountain bandit and changed the subject.
"Compared to that…"
Saying that, Garp pushed Luffy and Uta in front of him.
"These two guys are entrusted to you too."
The mountain bandits were all stunned when they heard this.
"Huh???"
Garp patted Luffy, "Come on, Luffy, Uta, say hello quickly."
"Yo!"
"Hello everyone!"
Luffy and Uta simply waved their hands.
The mountain bandits were still confused, and one of them asked, "Who are these two kids?"
"They are my grandson and granddaughter-in-law."
Garp said shamelessly, picking his nose with his finger.
Uta, in front of him, turned back and gave him a questioning look.
In response, Garp turned his head to the side, pretending not to see her.
The mountain bandits were all shocked when they heard this news.
"Two more?!"
"Garp's… no… Mr. Garp's grandson?!"
…
A moment later, several mountain bandits knelt simultaneously, shaking their heads in unison, speaking at the same time.
"We can't raise him!"
Garp seemed to have expected this, crossing his arms and saying,
"Then you choose!"
"Do you want to spend your life in jail, or do you want to raise these two guys?"
"All the countless sins you've committed, I've been pretending not to see them!"
"Hahahahaha…"
Faced with Garp's coercion, the Dadan Family dared not speak out despite their anger.
Just then, Luffy suddenly sensed something flying towards him from above and behind.
Under Observation Haki, he tilted his head and dodged it.
Upon closer inspection, what landed on the ground was a glob of spit.
Looking back, he saw a freckled boy with his arms crossed, sitting on a giant wild boar.
Ace!
Luffy didn't take Ace's sneak attack to heart.
But Uta, who didn't understand Ace, was different; she immediately started to stick up for Luffy.
"Hey! You, why did you spit on Luffy? Apologize now!"
Ace ignored Uta and stared intently at Luffy, his eyes filled with shock and confusion.
He couldn't understand why the child in front of him had so easily dodged the spit he'd launched from behind.
"Was it a coincidence?"
Ace currently had no knowledge of Haki, so he just assumed Luffy's dodge was a fluke.
At this moment, Garp also saw Ace behind him and immediately exclaimed in surprise,
"Ace!!!"
"Luffy, that's Ace. He's three years older than you and one year older than Uta."
"From today onwards, you'll be living with him."
"Make sure to get along well!"
The mountain bandits behind them immediately questioned,
"Eh? Has it already been decided?"
Garp tilted his head, his gaze sharpening, and his aura became intimidating without him even getting angry, immediately scaring the mountain bandits into standing at attention and stating,
"Yes! Then we'll take him in!"
"Alright, that's all for now. I'll come again when I have time."
Leaving that remark, Garp departed.