Haki Monster in One Piece World - Chapter 15

Chapter 15: Kuroobi Vs Mike

The world exploded in a silent concussion. Kuroobi’s Karakusagawara Seiken, the infamous Fishman Karate straight punch that needed no physical contact to transfer devastating force, slammed into Mike’s crossed forearms. Mike had thrown up the guard instinctively, Observation Haki screaming the trajectory and sheer intent behind the blow fractions of a second before it materialized. He’d poured Haki into the Armament coating on his arms, feeling the Level 2 power solidify into tangible, invisible armor.

CRACK!

The sound wasn’t bone breaking, not his own anyway, but the sharp report of focused kinetic energy meeting his Haki defense. Mike felt the impact like being hit by a speeding car – a brutal, jarring force that bypassed simple physical resistance. His Armament Haki flared, absorbing the brunt of the shockwave, preventing the catastrophic internal damage Fishman Karate was known for. But the sheer momentum was immense. He was flung backwards, feet skidding across the blood-slick floorboards, crashing hard into the flimsy back wall of the shack. Splintered wood exploded around him.

Pain flared along his arms, a deep, resonating ache rather than sharp breakage. His Haki had held, mostly. But the force had still bruised him deeply, rattling his bones. He tasted blood – bit his tongue on impact.

[Minor Internal Damage Sustained!]

[Fatigue Increased to 15%!]

The System flashed, confirming the hit wasn’t superficial.

He pushed himself off the crumbling wall, shaking his head to clear the ringing in his ears. Kuroobi stood where he’d thrown the punch, stance solid, knuckles still extended, eyes narrowed with surprise that Mike was still standing, seemingly functional. The Fishman Karate master hadn’t expected his opening power move to be weathered so effectively by a mere human. That surprise quickly curdled back into incandescent rage.

“Bastard,” Kuroobi growled, the pieces clicking into place. “No ordinary human could withstand that. But it won’t save you!”

With another roar, Kuroobi surged forward, closing the distance instantly. No more ranged shockwaves; this was pure, close-quarters Fishman Karate. A whirlwind of strikes rained down on Mike – knife-hand chops aimed at pressure points, powerful kicks targeting legs and torso, lightning-fast jabs. Each blow carried the potential for that devastating internal shockwave on contact.

Mike’s world narrowed to the incoming attacks. Observation Haki Lv.3, despite its energy cost, was indispensable now, running at full throttle. It was like watching Kuroobi move in slight slow motion, preceded by flickering phantoms of intent. Kick coming low… followed by right chop… feint jab then cross… His Haki screamed warnings, predicting the flow of the assault.

He moved, relying on his superior Physique-fueled speed and agility, enhanced by the Haki Attribute’s boost to his reaction time. He dodged, weaved, ducked under whistling kicks, slipped past blurring chops. The cramped space of the ruined shack became a deadly dance floor. Wood crunched underfoot, broken furniture became obstacles, the bodies of the fodder Fishmen grim set dressing.

But dodging wasn’t always possible. Kuroobi was relentless, his technique honed by years of practice, his Fishman physique granting him immense power and speed even compared to Mike’s enhanced human form. When a blow couldn’t be avoided, Mike reacted instantly, Armament Haki snapping into place on the threatened body part.

Whack! A karate chop aimed at his shoulder was partially deflected by an Armament-coated block, but the angle was wrong, the force still jarring his collarbone painfully. Thud! He blocked a powerful kick with a Haki-reinforced shin guard, feeling the impact vibrate up his leg. His strategy was clear: intercept the limb, prevent direct contact with his core body. Don’t let the shockwave bypass the armor.

Yet, inexperience was a harsh teacher. Kuroobi wasn’t just throwing random blows; he was a master martial artist. He pressed Mike, controlled the center of the small space, used feints Mike’s Observation Haki predicted but his reflexes couldn’t always counter perfectly. A lightning-fast jab slipped past Mike’s guard, grazing his ribs. Even without a direct shockwave hit, the sheer force of the Lv.40 Fishman punch was enough to crack bone. Pain exploded in Mike’s side.

[Rib Fracture Detected!]

[Moderate Internal Damage Sustained!]

[Fatigue Increased to 25%!]

Mike gritted his teeth, stumbling back, Haki flaring protectively over his injured side. He’d been too focused on blocking the main techniques, underestimating the danger of even glancing blows. Kuroobi pressed his advantage, a cruel smile finally touching his lips. “Not so tough now, are you, human?”

This fight wasn’t like assassinating Chew. This was a real battle, against a skilled opponent who could seriously hurt him. Mike realized relying purely on defense and dodging, waiting for an opening, wasn’t working. He was faster, yes, his Haki potential higher, but Kuroobi’s skill bridged the gap, and his Karate was designed to break down opponents from the inside out. Mike needed to go on the offensive, use his own power, and learn how to fight, right here, right now.

He took a ragged breath, ignoring the fire in his ribs. He activated Armament Haki on both fists, the familiar solidness settling over his bruised knuckles. He met Kuroobi’s next rush not with evasion, but with aggression.

Observation Haki showed Kuroobi leading with a sequence of rapid hand strikes. Instead of just blocking, Mike used his Haki-coated forearm to parry the first blow, deflecting it outwards, creating a momentary opening. Simultaneously, he lashed out with his other fist, aiming a hard, Haki-fueled jab at Kuroobi’s face.

Kuroobi, surprised by the sudden counter-attack, jerked his head back, the punch glancing off his tough, grey cheekbone but still snapping his head sideways. It wasn’t a damaging blow, but it broke his rhythm, forced him onto the defensive for the first time.

“Alright,” Mike thought, adrenaline surging, pushing past the pain. “Analyze. Adapt. Predict and counter.”

The fight shifted.

It became a brutal, chaotic exchange. Mike used his speed to dart in, land one or two hard Haki-punches, then evade Kuroobi’s powerful counters. He started reading Kuroobi’s Karate stances, recognizing the setup for certain kicks or thrusts. He learned to anticipate the shockwave projection, sometimes dodging into Kuroobi’s guard after predicting a straight punch, aiming for the body while the Fishman’s energy was focused outwards.

He took more hits. An elbow strike caught him high on the chest, stealing his breath. A low kick, blocked imperfectly, sent jolts of pain up his leg. But he gave as good as he got.

His Armament-coated fists began to leave their mark. A solid blow to Kuroobi’s side elicited a grunt of pain. A straight right connected with the Fishman’s jaw, staggering him. Fishman durability was high, but Mike’s Physique combined with Lv.2 Armament hit hard.

The shack groaned around them. Walls splintered further under missed blows. The floorboards cracked and buckled. The bodies of the fodder Fishmen were kicked and thrown around like grisly debris. Lamplight flickered wildly, casting long, dancing shadows that made the brutal ballet even more chaotic.

Mike felt himself learning, adapting with every exchange. His movements became slightly more fluid, his blocks more precise, his counters timed better. He was internalizing the rhythm of combat, the flow of attack and defense, in a way no amount of solo training could ever replicate. It was terrifying, painful, but undeniably effective.

Kuroobi sensed the shift. His opponent wasn’t just surviving anymore; he was fighting back effectively, learning at an unnatural rate. The human’s stamina, fueled by that strange Haki attribute, seemed immense, while his own rage, though still burning, was beginning to tax his reserves.

His Karate, while powerful, relied on landing clean hits to inflict internal damage, and the human’s combination of predictive dodging and hard Haki blocking was frustratingly effective at preventing that. He needed to end this.

With a furious roar, Kuroobi gathered his strength, dropping into a lower stance. Mike’s Observation Haki screamed danger – a powerful technique was coming. He felt the intent coalesce – Fishman Karate! One Hundred Tile True Punch – a devastating close-range blow designed to shatter defenses.

Kuroobi lunged, fist driving forward like a piston, aiming squarely for Mike’s chest, likely hoping to overwhelm his Armament Haki through sheer focused force.

Mike saw it coming. He saw the commitment in Kuroobi’s eyes, the slight overextension required for maximum power. He saw his opening.

In that split second, he made a choice. Not evasion. Confrontation.

He didn’t try to block the punch head-on. Instead, he shifted his weight slightly, letting the main force of Kuroobi’s fist graze past his ribs (sending another explosion of agony through his already injured side, but it was a calculated sacrifice). Simultaneously, pivoting on his back foot, he brought his own right arm around, not for a punch, but channeling everything into the Haki-coated blade still clutched in his fist.

He drove the Armament-enhanced fishing knife forward, aiming for the gap created as Kuroobi’s punch went slightly wide – the exposed side of the Fishman’s neck.

Kuroobi’s eyes widened fractionally in shock as he realized the counter, too late to retract his own attack or defend properly.

The Haki blade struck true.

It sliced through scale, muscle, and bone with horrifying ease, empowered by Mike’s strength and Lv.2 Armament.

Blood erupted, dark and viscous in the flickering lamplight.

Kuroobi let out a strangled, gurgling sound, his powerful punch losing all force as his body convulsed.

He staggered backwards, clutching at the catastrophic wound in his neck, eyes wide with disbelief and rapidly fading rage. He took one more shuddering step, then collapsed heavily onto the debris-strewn floor, stillness descending upon him.

Mike stood panting, swaying slightly, amidst the utter devastation of the shack. Blood dripped from his knife. Pain radiated from his ribs, his arms, his legs. His body screamed with exhaustion.

He checked his status: Fatigue: 78%.

The fight had taken a massive toll.

But Kuroobi, the Fishman Karate master, Arlong’s disciplined enforcer, was dead.

System notifications began to flood his vision:

[Opponent Defeated: Fishman Officer (Kuroobi, Physique Lv.40). Reward: Haki Attribute EXP +6000]

[Haki Attribute level up]

[Haki Attribute level up]

[Haki Attribute level up]

[Haki Attribute level up]

[Haki Attribute level up]

[Armament Haki Proficiency Increased Significantly due to Sustained Combat Application! EXP +2850] (Pushing him over 5000/10000 for Lv.3? No, just closer) [Current EXP: 5298/10000]

[Observation Haki Proficiency Increased due to High-Intensity Combat Prediction! EXP +1783]

[Physique EXP Increased due to Combat Exertion! EXP +3459]

[Physique Attribute level up]

[Physique Attribute level up]

[Physique Attribute level up]

[Physique Attribute level up]

[Fatigue Level Critical! Immediate Rest Recommended!]

He ignored the glowing text for now, leaning heavily against a miraculously still-standing support beam, trying to catch his breath. Two officers down in less than a day.

Chew by stealth, Kuroobi by brutal combat.

He had proven he could fight, proven he could kill Arlong’s elite. But the cost was high.

He was injured, exhausted, and Arlong was surely next.

He needed to disappear, recover, and prepare for the final confrontation. Leaving the ruined shack and its dead occupants behind, Mike stumbled out into the cool night air, the brutal lessons of his first real fight seared into his mind and body.