One Piece - Heaven Defying Comprehension!

On the unnamed island...

"What did you just say?!!!" 

Garp grabbed Ace by the collar and roared like a lion. His voice boomed across the island.

"I said, I don't want to be a Marine. I want to be a pirate!" 

Ace, unfazed by Garp's fury, nonchalantly picked at his ear and repeated himself.

"Pirate?! What nonsense are you talking about, you little brat!" 

Garp's teeth clenched as he glared at Ace.

"I'm serious. I want to become a pirate," Ace said, completely ignoring Garp's growing rage.

Garp's face darkened, veins bulging on his forehead. "Fine! If that's the case, I'll straighten you out right now! I won't let you become a pirate!"

Garp stopped calling himself "grandpa," his usual playful demeanor vanishing as his fists clenched tightly. 

Ace's eyes sharpened as he watched Garp's fists tense up. This was exactly what Ace wanted—a fight. He had deliberately provoked Garp, hoping to engage him in serious combat training. His goal was to push himself to the limit and trigger the Combat Turtle Breathing technique to rapidly strengthen his body.

As Ace's physique grew stronger, simple training was no longer enough to test his limits. But sparring with Garp, the legendary Marine hero, would easily push him beyond his current capabilities.

"Brace yourself, Ace!" Garp bellowed as he charged forward, his fist swinging down toward Ace.

Whoosh! 

Ace's body immediately transformed into flames, scattering through the air and retreating a safe distance.

"So, you've already mastered elementalization, huh?" 

Garp's eyes narrowed as he watched Ace turn into flames and escape. Even for a strong fighter, controlling a Logia-type Devil Fruit right after eating it usually took time and practice.

Garp had only just explained the Mera-Mera Fruit's abilities to Ace, but the boy was already wielding its power as though it was second nature. This exceeded even Garp's expectations.

"It seems I'll need to get serious. Don't think just because you've eaten a Logia-type Devil Fruit that you're untouchable! Get ready to feel the force of my iron fist of love!" 

A surge of black Haki enveloped Garp's fist.

Whoosh! Whoosh! 

With a sudden burst of speed, Garp's figure blurred, disappearing into an afterimage. He had used Marine Six Styles—Shave.

"So fast!" 

Ace's eyes widened as Garp reappeared above him in an instant.

Whoosh! 

Ace channeled all the power of the Mera-Mera Fruit into his right fist. His entire arm turned into a roaring blaze as he launched a punch. 

"Fire Fist!" 

Ace's fist erupted into a massive torrent of flames, shooting toward Garp like a dragon of fire. The heat from the attack distorted the air around them.

Garp's eyes flickered with surprise as the scorching flames approached. The power Ace was already displaying, so soon after eating the Mera-Mera Fruit, was remarkable. 

Still, Garp grinned. This kid will make a great Marine someday, he thought to himself.

"Let's see how you handle my iron fist of love, Ace!" 

Garp's jet-black fist, coated with Haki, seemed unassuming next to Ace's blazing fire punch.

Boom! Bang! Bang! 

The clash of fists echoed across the island.

"Hiss! You old man! You hit way too hard!" Ace's loud complaints rang out as he flew backward, his body crumpling from the impact.

---

Huff, huff...

Ace lay sprawled on the ground, panting heavily. His whole body ached, and it felt like every cell in his body had been drained of energy.

Meanwhile, Garp sat nearby, casually grilling the fish and Sea Kings that Ace had caught earlier. 

"Hahaha, Ace! Your new flame powers make for the perfect barbecue! Hahaha!" 

Garp's laughter boomed as he flipped the fish over the fire, barely acknowledging Ace's exhaustion.

"You... old man... Don't get too cocky... One day... I'll knock you flat," Ace muttered, barely able to move. Every muscle in his body screamed in pain.

The impact of Haki-infused punches was no joke. Ace had been completely overpowered by Garp, but he wasn't surprised. After all, Garp was one of the strongest men in the world—"Garp the Iron Fist."

But Ace had achieved what he wanted. Pushed to his physical limits, he could feel the Combat Turtle Breathing technique about to activate. This time, the benefits would be greater than ever.

"Oh? I look forward to that day, hahaha," Garp chuckled, still grinning as he tended to the barbecue.

"Well, it's almost done. I'll just—"

Whoosh! 

Before Garp could finish, Ace, who had been lying motionless just moments ago, suddenly sprang up with newfound energy. He dashed over to the roasted Sea King and began devouring it furiously.

Under Garp's astonished gaze, the massive Sea King, hundreds of meters long, was disappearing rapidly as Ace stuffed his face.

"Hey! You brat! Leave some for me!" Garp shouted in disbelief.