Day 1
Raizen dropped to the ground, hands planted firmly.
He pushed once.
Twice.
By the tenth push-up, his arms were trembling violently.
"Huff… huff… damn this body… it can't even do ten push-ups,"
he muttered, sweat dripping off his chin.
He collapsed to the floor, chest burning.
"And this is without multiplying gravity…"
Then—
A refreshing surge filled his muscles.
[As I said, this box is filled with pure mana. It regenerates stamina and boosts training.]
Raizen inhaled sharply.
"So that's how it is…"
He pushed himself up again.
This time he didn't stop.
He did push-ups until his arms gave out—
100 reps.
Then 100 squats—legs shaking like reeds.
Then 100 crunches—his core burning.
Then he started running.
He stumbled.
He fell.
He rolled.
He stood back up.
And completed 10 km.
It took him 10 full hours.
When it ended, Raizen collapsed face-first on the ground.
He didn't even make it to the hut.
He fell asleep right there on the dirt.
Day 2
Nothing special.
Pain.
Sweat.
Training.
He slept like a corpse.
Day 3
Something changed.
He finished the routine in 8 hours.
And he began touching the modern gym equipment.
Bench press.
Shoulder press.
Tricep extensions.
Slowly, painfully, he started to understand his body.
Day 7
The "routine" became warm-up.
100 push-ups.
100 squats.
100 crunches.
10 km run.
All done without struggle.
Raizen now trained 18 hours a day, with only 5 hours of sleep.
He could:
Bench 300 kg.
Squat 250 kg.
Deadlift 300 kg.
All under normal gravity.
Then the system spoke:
[Host has reached Trainee Level]
Raizen stared at the panel, shocked.
"Isn't this growth… too much?"
[Because this room is filled with pure mana.
And you have the genes of the Supreme Emperor.]
Raizen stared at his hands.
"…So this is my potential."
Day 25
[Host has reached Bronze-1 Level]
He could now freely train under ×5 gravity.
His punches shook the trees.
His kicks cracked the ground.
Day 50
[Host has reached Bronze-3 Level]
His strength soared again.
He could:
Lift 5,000 kg with ease.
Crush a boulder with a single punch.
Run faster than a galloping horse.
Sweat poured like rain.
Muscles hardened like steel.
His training turned violent, explosive, monstrous.
Day 75
[Host has reached Bronze-4 Level]
Raizen now trained under ×15 gravity.
Every punch sent shockwaves.
Every stomp cracked the earth.
Every breath burned like fire.
His body wasn't just strong.
It was transforming.
He was becoming something inhuman.
Day 100 — Final Day
A panel appeared when he finished his last set:
[Host has reached Silver-1 Level]
Raizen froze.
Silver.
His strength now exceeded human limits entirely.
He could:
Lift 100,000 kg
Punch through solid bunkers
Shatter stone walls like glass
Leap dozens of meters into the sky
Move with the explosive force of a bomb
And he could train under ×20 gravity as if it were normal.
Then—
A countdown appeared.
[10… 9… 8… 7…]
Raizen took a deep breath.
Already 100 days?
[3… 2… 1…]
A blinding flash.
Raizen appeared exactly where he vanished.
Morning sunlight washed over his face.
His hair had grown long, falling messily over his eyes.
He was shirtless—his body sculpted like someone who had trained for years, not days.
Hard muscles.
Sharp lines.
Defined abs.
Broad shoulders.
A monster made from work.
He exhaled, brushing his long black hair back with one hand.
"…Feels good.
Morning sunlight… finally."
Around him, the knights stood frozen.
Eyes wide.
Mouths open.
Their lord—
was no longer the weak Raizen.
He was overwhelming.
Powerful.
A silver-ranked monster.
Panels popped up:
[David: Bronze-3 → Bronze-4]
[Remi: Bronze-3 → Bronze-4]
[Nox Reven: Bronze-1 → Bronze-4]
[Others: bronze-1→ Bronze-3]
The knights erupted with excitement—flexing, punching the air, testing their power.
Raizen smiled—
But then paused.
"Nox… reached Bronze-4?"
He raised an eyebrow.
"How did he rank up faster than the others who were Bronze-1?"
The system replied:
[He trained harder than anyone else.
When others pushed themselves for sixteen hours, he pushed for eighteen.
And when they tried to match him, when their effort increased… their growth also followed.
David and Remi should never have been able to reach Bronze-3 to Bronze-4 with their average talent—
not even while training inside the special box.
But because of Nox, they all broke their limits.
His dedication dragged everyone upward.
Even Nox himself, though only slightly above average in talent, grew at a speed that shocked the others.]
Raizen called:
"Nox Reven!"
Nox sprinted toward him at full speed.
"Yes, my lord!"
Raizen placed a hand on his shoulder.
"You did well."
Nox froze.
Then—
His entire body trembled with happiness.
"My… lord praised me…"
He nearly fainted.
Raizen turned to the others and raised his voice:
"You all did well!"
The rest of the knights straightened, pride glowing in their eyes.
Then—
[2 hours left for 10th Wave]
Raizen hummed.
"Still two hours left."
He walked to Rex.
"What happened to the box?"
Rex bowed.
"My lord, it vanished the moment you appeared."
Raizen nodded.
So it was one-time use.
He picked up the sword he left earlier and called David.
"Let's spar."
David froze in terror.
"My lord… forgive me.
I cannot fulfill that order.
If I put even one scratch on your body… I will be unable to forgive myself.
Behead me if you wish."
Raizen facepalmed.
"Yo—yo, relax. I won't spar with someone trembling like that."
"Yo–yo, relax. And stop saying you'll behead yourself every time—I'm not that cruel."
Raizen glanced at the other knights and thought to himself,
…Yeah, they were definitely going to say the same thing and spar with me.
He sighed.
He would have to wait for the wave to get combat practice.
Then he looked at himself.
Shirtless.
Pants torn.
Hair long.
He glanced at his knights.
Their clothes were also half destroyed.
"…We need to go shopping."
He turned to Remi.
"How many goblin corpses are there?"
Remi counted instantly.
"350, my lord."
Raizen nodded.
"350… if one gives 50 bronze, that's 17,500 bronze coins."
He tapped his chin.
"I'll send Nox to sell them after completing the tenth wave wave.
Right now… we will wait."