The morning sun filtered through the paper screens of the new machiya, casting a grid of warm, golden light across the tatami mats. Yuki opened his eyes, staring blankly at the wooden ceiling for a few seconds as the memories of the past few days settled into his mind. The chaotic tournament, the brutal fights, the sheer exhaustion—it all felt like a distant fever dream. But the dull throb in his ribs and the heavy, plaster cast anchoring his right arm to the bed were stark reminders of reality.
Still, as he slowly sat up, a genuine smile touched his lips. He had secured the money for Hana and Aunt Mai, and they were finally safe. That was a victory worth the broken bones.
He glanced to his left. Yukari and Luna were tangled together in a mess of blankets, hugging each other tightly as if they had shared a womb rather than just a roof. Yukari's long blue hair was draped over Luna's small face, and both of them were snoring softly in perfect sync.
Careful not to wake them, Yuki slipped out of bed. He picked up his black earpiece from the bedside table, sliding it into his left ear. Kira's main cubic body sat silently next to the lamp, its sleek surface catching the morning light.
"Morning, Kira," Yuki whispered.
"Oh, good. You're conscious," Kira's synthetic voice hummed in his ear, dripping with her usual icy sarcasm. "I was beginning to wonder if you were dead."
"Why are you always so grumpy?" Yuki asked, padding softly into the kitchen and opening the fridge.
"Dealing with a biological disaster who solves problems by punching lightning usually sours my mood," she retorted seamlessly.
Yuki chuckled, downing a massive bottle of cold water.
Once his thirst was quenched, he walked into the center of the quiet living room. He lowered himself to the floor, lying face down on the tatami. Taking a slow, measured breath, he pressed his good left hand flat against the floorboards.
Slowly, relying entirely on his core and the terrifying, natural dense muscle he had built over the years, his body lifted. His legs floated upward until he was in a perfectly straight, one-handed handstand. He lowered himself until his nose brushed the floor, then smoothly pushed back up. One-handed handstand pushups.
"Yuki," Kira said, her voice dropping the sarcasm. "Why did you say you wanted to eliminate the rule of superiority by Kizo? How do you actually intend to do it?"
Yuki paused mid-pushup, holding his entire body weight steady on one palm. Then, his arm gave out. He collapsed onto the floor with a heavy thud, groaning as a spike of pain shot through his bruised ribs.
"Ow... why the sudden deep curiosity?" he wheezed, rolling onto his back.
"I am an intelligence system. Curiosity is my default state," Kira replied.
Yuki stared up at the ceiling, the playful glint fading from his blue eyes. "At first, I just wanted to protect the people I care about. Luna, Hana, Aunt Mai, Yukari. But the tournament taught me something. As long as this hierarchy exists—as long as people worship Kizo and treat 'Zeros' like trash—there will always be someone stronger trying to step on them. You can't just fight the symptoms. You have to eliminate the root."
"And your methodology?"
"I'm going to become the strongest," Yuki stated, his voice quiet but absolute. "I'm not entirely sure how I'll dismantle the system yet. But if I stand at the very absolute pinnacle of this world, I'll have the power to tear it all down. I'll find a way."
In the silence of the black box, Kira's processors whirred. She analyzed his vocal micro-tremors and his heart rate. He was telling the truth, but it felt incomplete. It felt as though he already knew exactly how to do it, and he was keeping the blueprint locked away in the darkest corners of his mind.
By late afternoon, the oppressive summer heat had settled over the city. Luna was fast asleep in the bedroom, completely wiped out after a rigorous hour of "wrestling" with Yuki. As he had playfully sparred with her, Yuki couldn't help but notice the terrifying reality of her physical growth. Her strength, was rivaling his own natural power, but he was currently in a weakened state.
In the living room, the atmosphere was much lazier. Yuki sat upright on the new couch, deeply engrossed in a heavy textbook titled Quantum Reversibility. Yukari, dressed comfortably in a simple white T-shirt and shorts, was lying horizontally across the couch, using Yuki's lap as a premium pillow while she mindlessly scrolled through her phone.
Knock. Knock. Knock.
Yukari let out a sharp, irritated sigh. She swung her legs off the couch, her blue eyes narrowing. Someone had dared to interrupt her peaceful afternoon with her brother. She marched to the front door and yanked it open, a glare already etched onto her face.
Standing on the porch was a small crowd: Seri Kyorin, Derek Uzushi, Mika Mizushi, Sophia Uzushi, Ren Kyorin, and his cousin Emi.
Seri had orchestrated the gathering. She knew Yuki was leaving soon for his brutal training regimen with her father, Lord Genji, and she wanted everyone to have a chance to say goodbye. More importantly, she saw it as the perfect opportunity to force Ren and Emi to properly integrate and make amends with the "Phantom."
Yukari didn't move. She stood in the doorway like a bouncer, her arms crossed. "What do you want?"
"We came to visit Yuki," Seri said politely, though she stood her ground against the Kinatarou's intimidating presence.
Before Yukari could slam the door in their faces, Yuki's head popped over her shoulder. He flashed a brilliant, welcoming smile. "Hey guys! Come on in."
Yukari immediately protested, trying to physically shove them back out the door, but Yuki grabbed her by the waist and hauled her backward, laughing as he ushered the guests inside.
The living room was cozy, but suddenly felt absurdly cramped. The couch was large enough to fit six people, so Seri, Derek, Mika, Sophia, Ren, and Emi sat down in a neat, slightly awkward row. Yuki and Yukari, the hosts and the two most High-tier Royals in the room, sat casually on the floor facing them.
Derek and Mika exchanged a nervous glance. They felt entirely out of their depth. Everyone else in the room was a Royal, yet the Kinatarous were sitting cross-legged on the tatami mats so their guests could have the expensive cushions.
All eyes were glued to Yuki. He looked incredibly pale, his right arm bound in a heavy cast, and shadows hung beneath his eyes, yet he carried that trademark, effortless grin that made it impossible to look away.
"I'll get you guys something to eat," Yuki announced, pushing himself up from the floor and wandering into the kitchen to prepare some snacks.
That left Yukari alone with the guests. She sat on her knees, her posture immaculate, and proceeded to glare at the couch with the intensity of a sniper. The silence stretched until it became suffocating.
Suddenly, Yukari pointed a slender finger directly at Emi. "Who is she?"
Seri cleared her throat. "That is Emi. She is my cousin."
Emi, who was nervously twirling a lock of her green hair, tried to maintain her haughty Royal expression, but she steadfastly refused to meet Yukari's piercing blue eyes.
Yukari's gaze drifted down the line. "I saw the glasses girl at the hospital. Sophia Uzushi, right? And you..." She pointed at Ren. "You're the Kyorin who lost to my brother. And the other two are Seri, Derek and Mika... you fought alongside him at the docks."
Yukari leaned back, crossing her arms. "Allow me to introduce myself properly. I am Yukari Kinatarou. I am sixteen years old, and I am Yuki's older sister by exactly one day. I currently hold the rank of Aethelgard, and I am a former member of the Zenith Vanguard. As long as you are friends with Yuki, I will be your friend. So, let's all get along."
Derek nearly choked on his own saliva. Mika's jaw dropped.
Aethelgard? The absolute peak of the Gamma stage. And she was only sixteen? To be a member of the Zenith Vanguard—humanity's elite shield—was an incredible feat, but to be an Aethelgard at her age made her a living legend.
Derek and Mika suddenly realized they had seen her on television broadcasts before.
"Wait," Derek stammered, rubbing his temples. "Former member? Why would you leave the Vanguard?"
Yukari shrugged casually. "I resigned a few weeks ago. Tracking down criminals was taking up too much time, and I needed to be home to properly take care of Yuki and Luna."
Before they could process the fact that she had thrown away a legendary career just to play house-mom, Yuki strolled back into the living room balancing two large trays loaded with fresh rice balls. He set them down on the low table and dropped back onto the floor, immediately stuffing one into his mouth.
As they ate, the initial tension began to thaw into curiosity.
"How are you feeling, Kinatarou?" Derek asked, eyeing the cast. Yuki simply gave a thumbs-up and kept chewing.
Rem leaned forward, his pride still bruised but his curiosity winning out. "During your fight with Derek... how did you generate lightning? You're an ice user."
Yuki swallowed. "I'm not telling you. It's my secret technique."
Mika leaned in next, her blue eyes wide. "And the black ice? I've studied elemental Kizo my whole life, and a black variant doesn't exist."
"I call it Obsidian Frost," Yuki said, though he shot a glare at the black box sitting on the shelf. "Mostly because Kira bullied me into giving it a cool name. I've only been using it for armor lately because the offensive output is too unstable. I can't control it properly yet."
Sophia adjusted her thick-rimmed glasses, her golden eyes locking onto him. "And your physical strength? The force of your impacts defies the biological limits of a Gamma without Ki enhancement."
Yuki raised an eyebrow, pausing with a rice ball halfway to his mouth. "Did you guys come here to check on my health, or is this an interrogation?"
They all smiled wryly. "We're just curious," Derek admitted. "You're basically a walking anomaly."
"I was born with this muscle density," Yuki didn't add the years of brutal, torturous conditioning that had forged his body. "It has nothing to do with Ki or Kizo."
Yuki's gaze shifted to Emi. The green-haired girl immediately shrank back against the couch, remembering the vile insults she had hurled at him in the arcade.
"I'm... I'm sorry about what I said before," Emi mumbled, staring intensely at her knees.
Yuki tilted his head, his lips curling into a devastatingly smooth smile. "It's fine. I usually don't mind insults when they come from someone with pretty eyes."
Emi's head snapped up. Her face instantly ignited into a brilliant, glowing red, her haughty demeanor completely short-circuiting as she tried to hide her blush behind her hands.
Ren coughed loudly to break the tension. "There's a rumor... a legend, really. They say the pureblood Kinatarou are actually descendants of ancient, powerful beasts. Is there any truth to that?"
Yukari smirked. She reached out, grabbed Yuki by the chin, and unceremoniously used her fingers to part his lips, exposing his teeth.
"You may not have noticed," Yukari announced proudly, "but Yuki has elongated, incredibly sharp canines. Much sharper than an average human's." She let go of his face, ignoring his annoyed grumble. "He also has a terrifyingly acute sense of smell, sight, and hearing. Those are animalistic traits. Haruki and Satoshi have them too. I don't, because I was adopted."
The room stared at Yuki's teeth in absolute awe.
"So... the Kinatarou really are beasts?" Sophia murmured.
Yukari shrugged. "Who knows? We might be. But there is one undeniable trait we all share. We have an intense, almost primal love for battle. Especially fights we engage in purely for pleasure. To a Kinatarou, a good fight is the second most pleasurable thing a human can experience."
Seri tilted her head, genuinely curious. "What's the first?"
Yukari didn't miss a beat. "Mating."
"Sex?" Seri repeated, her voice squeaking.
"Yes, sex," Yukari nodded solemnly. "The Kinatarou bloodline comes with an incredibly powerful, insatiable sex drive. It is a biological fact that the most enjoyable thing you can do in your entire life is to sleep with a Kinatarou." She pointed a finger squarely at Yuki, who was completely ignoring the conversation as he stuffed his fourth rice ball into his mouth.
"As I said," Yukari continued, her voice taking on a teasing lilt, "we love battle. But Yuki's thirst for battle is excessive, even by our standards. Which means... his drive for the other thing is equally excessive. All I'm saying is, whoever ends up as his future girlfriend is going to be a very, very lucky woman."
Complete silence fell over the living room.
Seri, Emi, Mika, and Sophia all turned perfectly synchronized shades of violent, boiling red. Their imaginations betrayed them instantly, and all four girls found their eyes drifting slowly to lock onto Yuki, who froze mid-chew, looking like a deer caught in headlights.
"I'm going to wash the dishes," Yuki announced abruptly, grabbing the empty trays and fleeing the room.
Sophia stood up smoothly. "I will assist you."
In the cramped kitchen, the sound of running water filled the silence. Sophia stood next to him, watching his hands.
"I don't know how to wash dishes," she stated flatly.
"Why did you even offer to help? Then just stand there and watch the master at work," Yuki joked. He scrubbed a plate, keeping his eyes on the sink.
"Sophia... back at the school, when you touched me. How much of my memories do you actually have?"
Sophia didn't blink. "I have everything from when you were six or five years old. The day you were locked in that room. I remember the torture. The escape. The cabin. Everything up until the moment I touched you in class."
Yuki's ears burned. He scrubbed the plate a little harder. "Do you... do you have my bathroom memories too?"
"Yes," Sophia replied, her golden eyes unblinking and her face completely devoid of emotion.
Yuki let out a strangled yell, almost dropping the soapy plate. "How can you say that with a straight face?! You've seen me naked!"
"If it causes you distress," Sophia offered in a perfectly monotone voice, "I can show you my naked body as well. It would balance the psychological equation."
"NO!" Yuki shouted, his face now rivaling a tomato. "You are more robotic than Kira! Seriously, what is wrong with you?"
He sighed, shaking his head. He turned his wet hand and lightly flicked her on the forehead. Sophia blinked, surprised by the sudden, gentle contact.
"Listen to me, Sophia," Yuki said, his voice softening into something warm and genuinely caring. "You save that for the person you truly love, okay? No one else is allowed to see you like that, okay?"
Sophia stared at his blue eyes for a long moment. Then, she obediently nodded her head.
Meanwhile, back in the living room, the conversation had taken a darker turn. Derek and Ren were leaning forward, asking Yukari about the suffocating "killing intent" Yuki had unleashed at the arcade and during the tournament.
"How does that even work?" Ren asked, shivering at the memory.
"Every Kinatarou can do it," Yukari explained, her tone turning eerily calm. "It's a manifestation of the predator-prey dynamic. When a prey animal comes face-to-face with an apex predator, their biology forces them to freeze or run. They are too overwhelmed with primal dread to move."
Suddenly, the ambient light in the living room seemed to dim. The air grew impossibly cold.
Derek and Ren gasped, the breath seizing in their lungs. The world around them vanished, replaced by an endless, suffocating darkness. The only thing visible was Yukari's glowing, crystalline blue eyes staring directly into their souls.
Their hearts plummeted into their stomachs. An unbearable, crushing weight pressed down on their chests.
They heard Yukari's voice, not in the room, but echoing from the deepest abyss of their own minds.
"Fear so pure... it overrides the body."
As quickly as it happened, the darkness shattered. The afternoon light flooded back into the room. Derek and Ren were both gasping for air, slick with cold sweat, their hands trembling violently.
Yukari sat across from them, sipping her tea with a pleasant, sunny smile.
Monster, they both thought simultaneously.
An hour later, the goodbyes were finally exchanged. The group gathered at the door, the tension of the afternoon having forged an unspoken bond between the elites and the "Zero."
As they stepped out onto the street, Yuki leaned against the doorframe, offering them a final wave. His eyes found Seri's.
"Don't forget, Seri-chan," Yuki called out, flashing a soft, promising smile. "We still have a movie to catch up on before I leave."
Seri's heart fluttered, and she offered a bright, determined nod before following the others into the evening.
Yuki stood in the doorway, watching them disappear into the fading light of the city. The laughter and the warmth of the afternoon slowly drained away, leaving only the quiet reality of what was to come. He looked down at his cast-bound arm, feeling the phantom ache of his shattered Ki channels.
Soon, he would leave the city. Soon, he would step into the ancestral mountains with Lord Genji Kyorin. The peaceful days were over; the true forging was about to begin. And as Yuki looked out over the horizon, his blue eyes hardened with the absolute resolve to tear the world's hierarchy to the ground.