Chapter 1: Another Cosmos Particle Body
[Selecting world for you...]
The system's voice returned after a few seconds.
[Selection complete. Next world: "Campione!"]
[Main Quest: Kill the "King of the End"! Reward: One Dimensional Roulette chance!]
Hearing the name of his next destination, Shirou immediately searched his mind for all information regarding this world.
Campione!—a world where humans have woven various myths, and those myths in turn gave birth to various gods. In that world, gods are not merely legends but lifeforms existing in a different form from humans, capable of manifesting in the physical world through certain means.
A Campione is a "Godslayer"—one who slays a manifested "Heretic God" and usurps their authority. They are kings, and Devil Kings wielding the power of gods. Every Godslayer is an existence reigning at the apex of the world, possessing strength enough to overturn everything. No modern magus would dare show even a hint of disrespect before a Devil King, for the gap between them is like heaven and earth. Power that a magus might spend their entire life struggling to reach can be wielded by a Godslayer with a simple gesture.
Of course, even among those at the top, there is a hierarchy. Among them, two are the strongest. One is undoubtedly Sasha Dejanstahl Voban, also known as Marquis Voban, the oldest of the Godslayers. He possesses the highest number of Authorities and a terrifying degree of mastery over them. He is a monster who treats godslaying as a form of entertainment.
The other is the Leader of the Five Holy Mountains in Jiangnan, Luo Hao. Renowned for reaching the pinnacle of martial arts, even Marquis Voban does not dare underestimate her. The two have been rivals for generations.
"Though this world is still full of danger for the current me, it also holds countless opportunities. If I can seize them, I too can obtain the Authorities of gods!"
The next moment, light filled Shirou's vision. What appeared before him was a city where the ancient and modern intertwined.
This was Rome.
The capital of Italy and its largest city—the political, economic, and cultural center of the nation. It has existed for over 2,500 years and is the birthplace of the Roman Empire, affectionately known as the "Eternal City."
The Rome here was not significantly different from the one in the Type-Moon world Shirou had just left. The biggest difference was that every myth and legend here held the potential for a deity to descend.
Shirou stood in a corner of a street. Pedestrians flowed past him; most of the local women wore retro-style long dresses, distinct from the tourists. Coming from a modern city, Shirou's attire was standard, though his striking looks drew frequent glances from passing women.
Ignoring the attention, Shirou found a bench and sat down, opening the "Dimensional Roulette" panel. With a thought, a shimmering screen appeared in his vision, listing various abilities, lineages, and items.
Yamato from Devil May Cry 5; The World: Over Heaven from JoJo's Bizarre Adventure; Red Supernova Dragon from Yu-Gi-Oh!; Zenith from Terraria; Izanagi-no-Okami from Persona 5; Another Cosmos Particle Body from Problem Children Are Coming from Another World?; Ryūjin Jakka from Bleach...
Looking at the dazzling array of powers, Shirou's eyes lit up.
"Begin," he whispered internally. The wheel began to spin. Shirou held his breath, watching the pointer that would determine his fate.
"Stop!"
The moment he gave the command, the wheel slowed and finally rested on a specific entry:
[Another Cosmos Particle Body (3S, Nano Machine Unit)]
In the world of Problem Children, this is the nano-perpetual motion machine found in the blood of the protagonist, Sakamaki Izayoi. It is called the "Final Mystery of Humanity," a completed Third Perpetual Motion Machine capable of creating energy from nothing by gathering information from its surroundings.
After the First Law of Thermodynamics was established, it was believed such particles couldn't be created from nothing. Later, the Second Perpetual Motion Machine was proposed—absorbing heat from the ocean or atmosphere to output work. But the Second Law of Thermodynamics (Clausius and Kelvin) declared that impossible as well. After countless theories were created and denied, Izayoi's parents used these "Star Particles" to complete a perpetual motion machine, naming it the "Third Cosmos Particle Body."
Whish!
A beautiful, star-like radiance swirled around Shirou before merging into his body. The particles began to flow through his blood, bringing him endless vitality. He felt a surge of power unlike anything he had ever felt.
His strength could shatter mountains; his speed exceeded the speed of sound; he could hurl objects at the third cosmic velocity. Incredible magical energy pulsed through every corner of
his body. His original Magic Circuits were destroyed by this overbearing power, then instantly reconstructed. If his previous mana pool was a stream, it was now an ocean.
Status Panel Name: Orihara Shirou
Race: Human
Lineage: Another Cosmos Particle Body
Special Ability: Unlimited Blade Works
Physical Strength: 240 → 1223
Reflexes: 361 → 1040
Vitality: 334 → 1377
Mental Power: 137 → 846
Shirou's stats had skyrocketed. His raw power now sat firmly in the "5-Digit" (Surface Level) domain. His constitution was far superior to the Godslayers of this world, rivaling even the Heretic Gods.
This "energy from nothing" could do more than power Great Magecraft; it could power an entire human civilization and lead billions into the vast universe. What limited him now wasn't "reserves," but the "valve"—how fast he could output that endless energy.
The most important thing now was to fight the Heretic Gods of this world, obtain Authorities to expand his combat options, and develop ways to output his energy on a larger scale.
Shirou clenched and unclenched his right hand, a fire burning in his brown eyes.
"This world will be my new stage."
He began walking through the Roman streets.
"Time to find a Heretic God."
Gods were the fastest way to gain power, and this world would not be lacking in them. Suddenly, Shirou frowned. As he had opened the Roulette, the crowds had thinned. The area near the railing ahead was completely empty of pedestrians.
"This is... a 'Mundane Repulsion' spell?"
Shirou noticed the anomaly and walked toward it. The Colosseum sat at the end of the road to his right, but he wasn't interested in sightseeing. He focused on a person standing by the railing, overlooking the road below.
Golden sunlight fell across the ochre and orange rooftops, lending the Eternal City an ancient beauty. Fountains and squares looked soft in the warmth. Below, the streets were busy, but here, no one approached. Every passerby seemed to be influenced by a force to turn another way.
Only Shirou ignored the spell and walked toward the slender figure by the railing.
She had beautiful hair as white as snow and a refined face. Likely a Westerner, she had exotic pale blue eyes and rosy lips pressed thin, as if she were nervous. She looked to be about fourteen or fifteen—a girl so ethereal that her beauty made it hard to look away.
Seeing her, a smile curled on Shirou's lips.
Liliana Kranjcar.
The girl known as the "Sword Fairy" had a troubled expression on her face as she looked at a stone tablet in her hands. It was something she had seized from an evil organization—a divine artifact symbolizing a certain god.
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