The city refused to sleep.
Even three days after the Dungeon Break, New Haven remained wrapped in a strange tension.
News channels replayed the footage of monsters pouring from the shattered Gate.
The Hunter Association insisted the situation had been contained within minutes, but rumors spread faster than facts.
People whispered about a mysterious young Hunter.
Some claimed he had destroyed dozens of monsters alone.
Others swore an S-Rank had arrived in time.
Only a handful of people knew the truth.
Aiden preferred it that way.
He pulled the hood of his jacket lower as he left his apartment before sunrise.
The streets were almost empty except for delivery trucks and workers beginning another ordinary day.
Ordinary.
He smiled bitterly.
That word no longer seemed to belong in his life.
The horn had disappeared the previous evening, shrinking beneath his skin without warning.
The black scales covering his right arm had faded as well, leaving only faint silver lines beneath the skin that looked like old scars.
Marcus had immediately classified the phenomenon.
“Adaptive Transformation,” he had called it.
Temporary.
Dormant.
Unpredictable.
Aiden simply called it troublesome.
“You know,” he muttered, “I’d appreciate a manual.” The Primordial Chimera remained silent.
For the first time in days.
Its silence was somehow more unsettling than its constant comments.
…
The Hunter Association training grounds sat beneath the city’s headquarters.
Hundreds of young Hunters practiced every morning, hoping to improve before joining guilds.
The moment Aiden stepped inside, conversations stopped.
“There he is.” “The Classless one.” “I heard he survived a Dungeon Break.” “Luck.” “No…
look at his eyes.” Aiden ignored them.
He had spent years being looked down upon.
Curiosity was easier to tolerate than pity.
Marcus was already waiting.
“You came.” “You said six o’clock.” “I expected you to ignore me.” “I considered it.” The Guild Master tossed him a wooden practice sword.
“Today’s objective is simple.” “I don’t like that sentence.” “You survive.” Before Aiden could ask what he meant, Marcus vanished.
A heavy pressure crashed into Aiden from behind.
Pure instinct took over.
He twisted.
The wooden sword intercepted another blade inches from his neck.
CRACK.
The impact threw him several meters backward.
Waiting where he had stood was Theodore Ashbourne.
The elderly Hunter smiled warmly.
“Good reflexes.” “You were trying to kill me.” “No.” Theodore tilted his head.
“If I wanted to kill you, you wouldn’t have blocked it.” Aiden wasn’t sure whether to feel relieved or terrified.
“Again.” The old man disappeared.
Aiden barely sensed movement before another strike came from above.
His body reacted before his mind.
His feet shifted.
His sword rose.
Another collision echoed through the training hall.
Marcus watched silently from the sidelines.
“Interesting.” Sophia adjusted her glasses while recording everything.
“He isn’t predicting the attacks.” “No.” Marcus folded his arms.
“His body is.” For the next hour Theodore attacked without mercy.
From the front.
From behind.
From blind spots.
Every strike came faster than the last.
Every strike should have landed.
None of them did.
Aiden’s breathing grew heavier.
His muscles screamed.
His vision blurred.
Then— Adaptive Body Activated.
Threat Analysis Complete.
Reaction Speed Increased.
Minor Adaptation Acquired.
A warm sensation spread through his spine.
The world slowed.
Not because time had changed— Because his body had become faster.
Theodore’s next strike looked strangely sluggish.
Aiden stepped aside effortlessly.
His wooden sword tapped Theodore’s shoulder.
Silence filled the hall.
The old Hunter blinked.
“…Well.” Marcus laughed for the first time in days.
“There it is.” Aiden lowered the sword.
“What just happened?” “You improved.” “I know that.” “You improved during the fight.” Sophia stared at the data on her tablet.
“No mana fluctuation.” “No skill activation.” “No Class.” She looked up.
“His body simply evolved.” Aiden swallowed.
The notification slowly faded from his vision.
It wasn’t giving him power.
It was changing him.
Little by little.
Battle by battle.
…
Training ended shortly before noon.
Every muscle in Aiden’s body hurt.
He collapsed onto a bench with a bottle of water.
Theodore sat beside him.
“You know why Marcus asked me to train you?” “Because you enjoy bullying teenagers?” The old man laughed.
“I’ve trained thousands of Hunters.” “And?” “I’ve never met one whose greatest weapon wasn’t talent.” He looked directly at Aiden.
“Yours isn’t talent.” “What is it?” “You adapt.” The words lingered.
“Most Hunters become stronger by gaining levels.” Theodore tapped Aiden lightly on the chest.
“You become stronger by surviving.” Aiden stared at the ground.
It sounded simple.
But somehow…
It felt frightening.
…
Later that afternoon, alarms rang throughout the Association.
A small Gate had appeared twenty kilometers outside the city.
F-Rank.
The weakest possible category.
Normally, rookie Hunters handled such Gates without supervision.
Marcus looked toward Aiden.
“You wanted to help people.” “I did.” “Then today is your chance.” Aiden frowned.
“I don’t have a Hunter License.” “You’ll be observing.” Marcus smiled.
“…Probably.” “Probably?” …
The convoy reached the forest an hour later.
The Gate shimmered between ancient trees, barely three meters wide.
Around twenty rookie Hunters waited nervously.
Some looked excited.
Others looked terrified.
Aiden recognized the feeling.
Marcus addressed the group.
“This is an F-Rank Goblin Nest.” Several rookies sighed in relief.
“The mission is simple.” He looked around slowly.
“Stay alive.” The Gate opened.
Cold air spilled outward.
One by one, the rookies entered.
Aiden stepped through last.
The world changed instantly.
Sunlight vanished.
Ancient trees twisted toward a gray sky.
The forest was unnaturally quiet.
Too quiet.
Marcus frowned.
“This…” Sophia slowly lowered her scanner.
“…is impossible.” The readings had changed.
Rapidly.
The Gate’s mana density doubled.
Then tripled.
Cracks spread across the air itself.
Marcus’s expression darkened.
“This isn’t an F-Rank Gate anymore.” A deep roar echoed through the forest.
The ground trembled.
Birds burst from the trees.
Every experienced Hunter reached for their weapon.
Aiden felt the silver marks beneath his skin grow warm.
For the first time since entering the Gate…
The Primordial Chimera finally spoke.
Its voice was calm.
Ancient.
Almost…
interested.
Something inside this Gate should not exist.
The forest fell silent.
Then a pair of enormous crimson eyes slowly opened within the darkness between the trees.
And every Hunter present instinctively realized the same terrifying truth.
Whatever was waiting for them…
It was never supposed to appear inside an F-Rank Dungeon.