The last thing Dr. Aris Thorne remembered was the cold. Not the clinical, sterile chill of his operating theater, but the heavy, metallic bite of the execution chamber.
He had spent fifteen years perfecting the art of the scalpel. He was a man who navigated the labyrinth of the human brain with the grace of a virtuoso, only to be undone by a coworker's petty spite. A sabotaged IV drip, a dead senator's son, and a trail of planted evidence had turned the "Miracle Worker of Manhattan" into a condemned man.
Then, the darkness broke.
Aris opened his eyes to the smell of damp earth and cheap antiseptic. His head throbbed with a rhythmic, pounding ache that felt less like a hangover and more like a soul being shoved into a suit two sizes too small.
He stared at his hands. They were large—unusually so—with thick knuckles and callouses he didn't recognize. He scrambled to a cracked mirror propped up on a milk crate in the corner of the cramped room.
The face staring back wasn't the tired, forty-year-old visage of Aris Thorne. It was a teenager with a jawline like a shovel, spiky black hair that defied gravity, and a pair of eyes that looked far too old for the face they inhabited.
"Leorio Paradinight," Aris whispered, the name tasting like copper and regret. "I'm in Hunter x Hunter."
He wasn't just a fan of the series; he was the type of reader who analyzed the medical feasibility of Nen-enhanced surgeries during his lunch breaks. He knew this world. He knew the tragedy that awaited this boy—the death of his friend Pietro, the crushing weight of poverty, and the desperate drive to become a doctor.
But the timeline was off. He looked down at a discarded newspaper. Jan12th. Based on the developmental stage of this body, he was seventeen. The Hunter Exam wouldn't begin for another two years.
"Two years," Leorio muttered, his voice cracking. He felt a sudden surge of grief that wasn't his own—a phantom pain in his chest for a friend he had never met, but whose death was the catalyst for everything. "Pietro... I'm sorry. I wasn't here yet. But I'm here now."
The City of Yucanto, located in the United States of Saherta, was a sprawling urban bruise. It was a place where the sun felt distant and the shadows felt hungry. Leorio lived in a dilapidated orphanage on the outskirts, a place that provided a roof but very little else.
As a neurosurgeon, Aris knew the biological cost of growth. At 185 cm (roughly 6'1"), this body was already a giant for its age, yet it was skeletal. The ribs were visible beneath the thin, threadbare shirt. To reach the physical peak required to survive the Hunter Exam—to survive Hisoka and the Phantom Troupe—he needed protein. He needed calories. He needed a foundation.
The orphanage's watery cabbage soup wasn't going to cut it.
Internal Monologue: My brain is screaming for glucose, and my muscles are catabolizing themselves just to keep me standing. If I want to master Ten, if I want to even touch the gates of Zoldyck, I can't be malnourished. I have the knowledge of a world-class surgeon, but I'm trapped in a body that's currently a failing biological machine.
He looked at the map pinned to the wall of the communal room. Forty kilometers to the north lay the Yorbian wilderness—a dense, dangerous forest known for harboring beasts that the local police refused to hunt.
"Compensation," Leorio said, clutching his chest. "Leorio, you gave me a second chance. My world executed me for a crime I didn't commit. In return, I will give you what you always wanted. I won't just be a doctor who treats the poor. I will be the greatest physician this world has ever seen. I will conquer the Hunter Exam, and I will never let a patient die because of a lack of money—or a lack of power."
The Forty Kilometer Trek
The journey began at 4:00 AM.
Leorio didn't have hiking boots; he had worn-out loafers that he'd reinforced with duct tape and cardboard. He carried a rusted kitchen knife he'd sharpened against a river stone and a length of hemp rope.
The first ten kilometers were a test of sheer willpower. His lungs burned. The Saherta air was thick with humidity, and his 185 cm frame felt ungainly. He was tall, but he lacked the coordination of the "original" Leorio. He felt like a newborn giraffe trying to run a marathon.
Think, Aris. Control your breathing. 4-4-8 ratio. Inhale for four, hold for four, exhale for eight. Minimize cortisol production. Lower the heart rate. You aren't a runner; you're a surgical instrument. Precision over power.
By twenty kilometers, his feet were bleeding. He stopped by a stream, not to rest, but to perform a field assessment. He peeled back the tape, wincing as skin came with it.
"Stage two pressure sores already," he hissed, his surgeon's mind detachedly analyzing the trauma. "Ironic. I used to lecture residents on the importance of proper footwear for long shifts. Now I'm literally walking my skin off for a chance at a steak."
He didn't quit. He couldn't. The memory of the lethal injection—the cold chemical burn entering his veins—acted as a goad. Every step away from Yucanto was a step away from the grave.
When he finally reached the edge of the forest, the sun was beginning to dip. The trees here were gargantuan, their roots snaking across the ground like petrified serpents. This wasn't a park; it was a prehistoric larder.
Leorio's senses were on high alert. He didn't have Nen yet—he knew better than to try and force his Micropyles open without a teacher—but he had the observational skills of a man who had spent decades looking for microscopic tumors.
He spotted it within an hour: a Great-Horned Boar. It was a massive creature, easily three hundred pounds of muscle and aggression, rooting around the base of a cedar tree.
Internal Monologue: Its carotid artery is protected by thick layers of subcutaneous fat and muscle. A frontal assault is suicide. I have one knife and a body that's trembling from hypoglycemic shock. I need to be a surgeon. One incision. One perfect moment.
He climbed a low-hanging branch, his large hands gripping the bark with desperate strength. He waited. He slowed his pulse until he was almost a part of the tree.
When the boar passed directly beneath him, Leorio didn't jump like a warrior. He dropped like a falling scalpel.
He landed on the beast's back, his legs locking around its barrel chest. The boar squealed, a sound that vibrated in Leorio's very marrow. It bucked, slamming him against the trunk of the tree. He felt a rib crack—a sharp, localized snap.
"Not... today!" Leorio roared.
He didn't stab blindly. He felt for the junction of the atlas and axis vertebrae at the base of the skull. With a burst of adrenaline-fueled strength, he drove the rusted knife into the spinal column, twisting it to sever the medulla oblongata.
The boar collapsed instantly. Brain-to-body communication: severed.
Leorio tumbled onto the forest floor, gasping for air, his hand still clutched around the hilt. He was covered in blood, his chest was screaming in pain, and his vision was swimming.
He didn't waste time. He couldn't afford to let the scent of blood linger.
Using his knowledge of anatomy, he butchered the animal with haunting efficiency. He didn't just hack at it; he followed the fascial planes, separating the loin and the hams with the precision of a man performing a craniotomy.
He built a small, shielded fire and cooked the first strips of meat. As the fat hit his tongue, Leorio felt a rush of dopamine so intense it brought tears to his eyes.
"I'm alive," he sobbed, the meat clutched in his blood-stained hands. "I'm actually alive."
He sat there in the darkening Yorbian forest, a 185 cm teenager with the mind of a dead genius, eating the spoils of his first hunt. He looked at his hands—the hands that would one day hold the lives of the world's elite, the hands that would punch Ging Freecss, the hands that would save Gon.
He had two years. Two years to turn this malnourished frame into a vessel for the Nen he knew was possible.
The Surgeon's Vow
As the fire died down to embers, Leorio stood up. His rib hurt, his feet were ruined, and he was forty kilometers from home. But for the first time in two lifetimes, he wasn't a victim of someone else's malice.
"I'll take your dream, Leorio," he whispered into the dark, his voice steadying. "I'll get that license. I'll get that money. And I'll make sure that no one—not a king, not a Hunter, and certainly not a jealous colleague—ever stands in the way of my operating room again."
He began the long walk back, the heavy sack of meat slung over his shoulder, a ghost of a smile playing on his lips.
The world of Hunters had no idea what was coming. A man who had already faced death and been cheated by the law didn't care about the "rules" of the exam. He was a doctor. And he was here to cut out the rot of this world, one way or another.