Scene

Night time.
The MC is inside his room.

MC:
“Before going to the academy, I want to make myself a bit stronger.

I don’t know how good or how bad the world outside this house really is…
Or how dangerous the academy people and their tests are.

I don’t want to go straight to the academy like characters from other anime, or enter at an early age.

I want to be sure that when danger comes in the future, I can survive on my own strength.

In this world, there are many powerful people—
You never know who is a friend and who is an enemy.

To protect myself and my family, I’m ready to break my limits no matter what.

Now I’ll tell you how to live in another world…
When you don’t know anything about that world.”

Scene

The MC writes several magic formulas on paper and tries to use one of them.

MC:
“SECRET DOOR.”

Scene

Suddenly, a portal appears inside the room—but instantly vanishes.

Blood comes out of the MC’s mouth, and he falls to the ground.

MC:
“Agh…!!!
Haahh…!!
Aaahhh…!
Aaa…!”

Scene

The MC screams in pain.

The room door opens, and his parents—his dad and his mom, Emily—rush in with worried faces.

Dad:
“W–what happened?!”

Emily:
“What happened?! Are you okay?!
Heal!”

Scene

The MC begins to heal.

Dad:
“What happened, my child?”

MC:
“D–Dad… haahh…
I was practicing magic, and suddenly the pain started.

Maybe there are some kinds of magic that don’t suit my body…
Or maybe my body isn’t ready for that magic yet.”

Emily:
“A–are you okay?”

MC:
“Hm.” (nods)

Dad:
“Don’t ever do this again… please.
It’s dangerous.

People who don’t go to the academy and try to learn new magic—
Their bodies can’t handle the pressure of magic.

That’s why everyone goes to the academy to learn magic.
There, they train the body along with magic.”

MC (thinking):
“I see…”

Emily:
“If you need my help, tell me what you need.”

MC:
“I’m okay, Mom and Dad.
You can go and sleep.”

Dad:
“But—”

MC:
“I’m going to sleep now, so don’t worry.”

Dad:
“Hm…”

Emily:
“Let’s go.”

Scene

They leave the room.

The MC stands up again.

MC:
“Uff… let’s try again.
This time—SOUND BARRIER.”

Scene

A yellow barrier appears around the room.
No sound can escape from inside.
After a moment, it vanishes.

MC:
“Now—SECRET DOOR.”

Scene

The MC feels the same level of pain again, but this time he endures it.

A portal appears.

MC:
“Ag… hm…
Just a little…!!
Ahn… haahh… ah…
Finally… uff… ahaa…”

Scene

The MC steps into the portal.

Inside is an empty place—
Nothing exists except black space.

MC:
“This is a good place.

I didn’t imagine anything specific for this domain,
That’s why there’s nothing here yet.

Just creating a normal void space made me like this…
If I tried to create a green open land, I might’ve died.

Hehehe… this is really amazing!”

Scene

The MC walks a bit deeper into the space and stops.

MC:
“So my body isn’t capable of high-level magic yet…

But I used Fire Storm without any problem.
Maybe that magic isn’t actually that powerful.”

Scene

The MC takes a stance.

MC:
“So first, I need to strengthen my body.

In isekai worlds, they usually don’t show this, but yeah—
Even if you gain power, your body doesn’t automatically adapt.

You have to build it yourself.

So let’s begin—
STONE SPEAR.”

Scene

Two small stone blades appear, each about 1–2 inches in size.
The MC grabs them.

MC:
“Hm… they’re not that heavy.
But for now, they’re fine.”

Scene

The MC starts doing dumbbell exercises with them.

After 30 minutes, he throws them away and creates bigger, heavier stone spears, then starts exercising again.

MC:
“Aaa…!
These are heavier.

After 4–5 reps, it’s getting really tough.
At least I’ll train with these for 5 minutes…
Eeee…!!”

Scene

After 5 minutes, the MC sits on the ground, exhausted.

MC:
“Haaahhh…!
Ahaa… haahh…

Five minutes was hard, but I did it.
I’ve done around 300 reps…
I can’t do more than this.”

Scene

The MC closes his eyes, then suddenly opens them.

MC:
“So let’s do it!
ENERGY BUFF!”

Scene

His stamina increases.

He starts training with stone spears that are even bigger and twice as heavy than before.

MC:
“YAAAAAAAAA—!!!!!!!”

Scene

After 10 minutes, the MC sits on the ground again.

MC:
“Uff… are you kidding me?

This buff didn’t even last 10 minutes…!

In anime, buffs last 30 minutes, 1 hour, or even longer.
So why not mine?

Uff… okay then, let’s do some running.”

Scene

The MC stands up and starts running inside the empty void.

MC:
“Esss…!
As fast as possible—just run!!”

Scene

After 30 seconds, the MC collapses to the ground again, exhausted.

MC:
“Ahaa…! Ahaa…!
Can’t do more.
Let’s try again next time.”

Scene

The next day, after waking up, the MC creates the portal again.
He feels the same level of pain, enters the space, and starts training again.

He continues this training every day.

Scene

Meanwhile, his parents are shown talking in their room at night.

Emily:
“Are you sure our child will be okay?
He’s been training a lot these past few days…”

Dad:
“Hm… I don’t know.
But I’m sure that once he decides something, he’ll definitely do it.

I can already see changes in his body—
His muscles have become much stronger.”

Emily:
“I noticed that too…
But as a mother, I worry about him.”

Dad:
“I’m his father, so I worry too.

But you know—
In this world, the more powerful someone is, the better it is for them.”

Emily:
“Hm… I know.”

Dad:
“As parents, we can only hope that he doesn’t do anything stupid during his training…
Or seriously injure himself… or worse…”

Emily:

“I hope so…”