Breakthrough with the Forbidden Master Chapter 4 – Encounter

Forbidden Master

My parents were both commoners.
They were childhood friends and classmates in the Academy, and then they were chosen as members of the Hero party… And well, various things happened, they got married and I was born.
Consequently, this elegant mansion was constructed after their union.
Within this mansion, there is a spacious area that is usually locked, containing a vast collection of weapons and magical artifacts from various eras and cultures.
Some of these items are displayed in showcases, while others adorn the walls, including swords and armors.
My father, a magic swordsman, probably acquired this large quantity of weapons as a hobby.
Despite his claims of mastering various martial arts, I have never witnessed my father wielding a spear or an axe.
However, towards the back of this exhibition room, there lies a sturdier and more secure door.
It can only be opened once every year, and inside lies the treasure that altered the course of history and saved humanity.

“Very well then, Young Master. I’m going back to bring more cleaning tools, so in the meantime, please go inside and enjoy yourself to your heart’s content. If you plan to steal something, please do your best~. Well, I suppose it’s impossible for an inexperienced Young Master like you to draw the sword that’s sealed on the pedestal anyway~”

"I’m not going to steal anything! Geez… well… seeing something like this doesn’t matter to me now…"

I unlock the door with the key I received while fuming at Sadis’ sarcastic remark.
As the doors swings open, I am greeted by a plain and dreary square room.
A pentagram magic circle is drawn on the floor, and right at its center stands a sword impaled on a pedestal.

"…… The Sword of the Hero…… The strongest in the world… Hmm?"

This room was only opened once a year. Since I hadn’t been present for previous occasions, it had been several years since I last entered this chamber and laid eyes on the sword…

"…… Huh?"

However, instead of the sword, I was looking at something else.

Ha… the door has opened… I see, ‘tis been a year… how many instances is this now… 15 times, I think…so ‘tis been 15 years now

It’s wasn’t my muttering. No one was supposed to be inside this Sealed Chamber, which was always locked and inaccessible to anyone.
However, as I stepped inside, I realized that someone was already present within the chamber.

Hmm? This one… ah… Heero’s offspring… he was once a wee child back in the day, yet he has since grown and now bears a resemblance to Heero…

"Tch, who the hell are you!! How did you get in here!?"

What?

Wait, why are you even surprised over there?
Furthermore, he’s not human!
He has long, silver hair. Two sharp and ominous devil’s horns are protruding from his head.
A medieval beauty, who could be either male or female, has strange patterns engraved around the eyes.
A mysterious demon draped in a purple robe that covers the entire body.
I raised my voice and prepared myself.

…Oi… How can this be… Child…
"!?"
Do you see me? Do you hear my voice?
"W-What the hell are you talking about! How did you even get into this room? Are you a demon? A burglar!?"
What!? What does this signify… Could it be… has something changed during my fifteen years of solitude?

Fifteen years? What is this guy talking about? No matter how you think about it, he doesn’t seem to be a decent person, and yet I can feel an odd presence from him.
This guy is not normal!

"Young Master… You are being noisy. Did you seriously try to pull out the sword?"
"Sadis! Watch out, there’s a weird guy here!"
"…?"

At that moment, Sadis came in with cleaning tools in hand after hearing the commotion.
With her here, there won’t be any problem.
Sadis may be a maid, but she graduated from the Academy with excellent grades and holds the qualification of a Senior Warrior.
I don’t really understand why someone like her is content with being my exclusive maid, but when I was a kid, she was a capable person who even acted as my bodyguard.
With both Sadis and me present, it doesn’t matter who this guy is…

"Young Master, there’s no one else here…"
"Eh?"
"…Have you been so paranoid with your virginity that you’ve started hallucinating and experiencing delusions… Geez…"

Looking into the Sealed Chamber, Sadis should have definitely seen the figure of a demon. However, she appeared genuinely unable to see anything, and she stared at me with doubt.

"Eh? Wh-why? It’s right there, isn’t it?"
"Young Master, is this a prank to scare me and try to take advantage of me? It won’t work so please give up. Please remain a virgin for a little while longer."
"It’s not like that, eh?"
"Well then, I still have some preparations to make. Please try not to make too much noise, Young Master."

She really couldn’t see anything? Sadis went back to prepare for cleaning.

Apparently… the only one who can see me… Child… is you…
"!?"
Nevertheless… I had lived for tens of thousands of years with a corporeal form… but to think that it would bring me such joy to merely converse with someone after but a few dozen years… how pathetic… to be defeated by humans…

This is crazy! Could it be that only I can see him?

Restricted to this narrow space… the sole occasion when another enters is during the yearly cleaning… why has this fate befallen me? Is it a prank from the gods? Hmph, be it as it may… I understand. My intuition guides me. I inhabited this sword, but… Child, I can possess you as well!

"Wh-what…"

'Tis ironic, but… also fortunate in a way. That fool Heero has not once taken this sword beyond these walls since his victory over me, hence I have not beheld any scenery beyond these confines… Fuhahahahaha!

"Wha-What the hell are you talking about?! Oi, who the hell are you?!"

Then, the demon approached me with a smile that was a mix of delight and madness.

"Don’t come any closer! Whoever you are… Listen to me! I’ll beat the crap out of you!"

I instinctively grabbed the mop that Sadis had prepared for cleaning and prepared myself for a fight.
Using the same technique as with a sword, I infused it with my specialty lightning magic, enhancing its power even further.

Hoh… a Magic Sword but… ‘tis unrefined. Mediocre. It cannot measure up to Heero’s swordsmanship.
"!? You bastard!"

I attacked the demon with all my might. But the demon I thought I had definitely caught managed to easily evade my attack.

'Tis pointless. Mine is but a spirit body, your assault is for naught. Nonetheless, ‘tis fortunate for you that I am a spirit.
"What!?"
With a Magic Sword of such calibre, even with a hundred years of training, you would not have been a match for me during the era I was active.
"…Guhk…"
Nonetheless, I shall be relying on you from now on. At the very least, allow me to introduce myself properly.

After uttering those words, the demon once again approached me and stood before my eyes…

My name is ‘The Great Demon King Treinar’… I once aspired to conquer the surface world, but I was vanquished by your father and his allies.
"Guhk!?"
In this modern world that has lost me… you shall be my eyes, Child.

And then, my consciousness faded away.

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