Chapter 13 – Demon King’s Castle: Prison Realm Ifgarde

“Ooh…!?”

The mirror led to a bleak little room boxed in by stone walls on all sides. Stairs climbed up from the back.

“This way.”

Mirea Moon hopped up those stairs lightly. I followed, and it opened into the inside of a building.

“This is…!? A mansion…!?”

“Yeah. Though no doors lead outside.”

The building seemed decently spacious, but no windows or exits.

The colors were bright enough that it didn’t feel too suffocating.

“This is Prison Realm Ifgarde…?”

“That’s right. Think of it as the demon king’s hidden castle in another dimension… separate from normal space.”

It wasn’t in the real world, apparently.

Mirea Moon had linked it to the mirror in my room, so that was basically the entrance and exit.

“Looks like the inside of a regular building at first glance… but what’s the prison part?”

“…Let’s start with the functions. Keep in mind not everything’s operational yet.”

Prison Realm Ifgarde had two big features. One was the prison function, as the name implied. The other was as a workshop.

“You can lock up targets who meet certain conditions. And that ties into refining demon god medals.”

“What do you mean?”

“It involves karma value, hate value toward the demon king, and total magic power… Basically, lock someone specific in here, and over time, it refines demon god medals based on that duration.”

People rack up karma value the more evil deeds they do. And hate value climbs with grudges against me personally.

Add magic power to those two, and the higher the total, the longer you can keep the target imprisoned.

“Lock in someone with high values in all three, and you can churn out demon god medals over a long stretch.”

“What happens when the time runs out?”

“They get forcibly teleported back to the real world. Want to lock ’em up again? Gotta capture them fresh.”

The teleport spot wasn’t random either—it’d be somewhere with strong ties to the target.

“So basically, catch a bunch of real bad guys, right?”

“Not that simple. Right now, there’s only one prison cell. And per cell, one prisoner max, as a rule. Don’t wanna waste a long slot on someone who barely yields anything.”

Once you lock in a prisoner, even as demon king, you can’t kick them out till time’s up—unless you kill them.

Expanding cells costs demon god medals, and an insane amount at that.

“Let’s head to the actual prison cell. This way.”

I followed Mirea Moon to a room with a massive mirror.

Passed through it like before, into a dim hallway. And at the end…

“Ooh…”

An iron-barred cell. That groove in the corner—probably the toilet.

“This is the prison cell. Lock a target in here, and as time passes, it refines demon god medals. Turns them into power for the demon king.”

“What about water or food?”

“No need to worry while they’re in here.”

Some fantasy mumbo-jumbo handled it, I guess.

“That’s the prison side of Ifgarde. But prisoners come with torture and interrogation, don’t they?”

“Not sure if it’s a given, but yeah…”

The cell was empty. In my vague image, places like this should have torture devices… wouldn’t feel out of place.

“Ties into Ifgarde’s second function too. Use this as a workshop, and you can craft all sorts of tools.”

“You mentioned something about a mage’s workshop when we first talked. Related?”

“Yes. Might as well head there.”

I followed Mirea Moon’s lead and started moving again.

The workshop was inside the mansion. No mirror hop needed, apparently.

“This is the workshop.”

A huge pot about my height sat in the center of the wide room.

Round mouth, diameter maybe my arms spread wide. Pretty massive.

“Pull out your World Staff Milusvein and access it.”

“Got it. …Ryuzu.”

A white staff appeared in my right hand.

Mirea Moon said I could keep it out here without draining my magic.

“Ah… the info on the screen changed.”

“You should see the list of craftable tools?”

“Yeah… wait, this is…!?”

Like she said, the craftable tools list popped up. But the contents—I couldn’t hide my shock.

■Category: Drugs

〇Stamina Potion

〇Mana Potion

〇Wound Potion

〇Sensitivity Booster

〇Diuretic

〇Age Manipulator

〇Hypnosis Inducer

〇Mana Excretor

…And so on. Tons more shady-named drugs.

Other categories like 〈Costumes〉 or 〈Sex Toys〉—clearly nothing but erotic purposes.

Those shocked me too, but what floored me most…

“Th-these costumes and tools are…!?”

Yeah… straight out of my old world. High-leg bloomers, competition swimsuits, micro bikinis, Arabian dancer outfits. Erotic nun getups, miniskirt shrine maiden clothes, lewd swimsuits and lingerie galore.

Sex toys category: guillotine stands, vibrators, massagers, clit suckers, all kinds of restraints—lined up for any kinky play imaginable.

“Noticed huh? Tools that bring your fantasies to life…!”

“Y-yeah…! But seriously, what is this!?”

“It creates tools for the sex acts you imagine—turns fantasies real! That’s why you were chosen as demon king…!”

Ah… right, Mirea Moon got super impressed by that HENTAI elite education from Japan…

So only I could manifest these in this world.

(But…! This is a huge perk…!)

I’d figured plays using stuff from back there were impossible here.

But no. Craft ’em in the workshop, and the possibilities go infinite…!

“Once crafted, you can access the staff to install tools in the prison cell anytime. And for imprisoned prisoners, staff controls let you force costume changes or trigger drug effects.”

“Whoa, badass.”

So lock a beauty in the cell, and no need to say “wear this”—I can force the swap myself.

“Play with prisoners generates demon god medals too. Factor that in when picking who to lock up.”

Makes sense—better to go for women if you’re imprisoning anyway.

“So how do I craft these tools?”

“You need material points. See that pot?”

“Yeah… this big one.”

“Yes. Toss anything in, and it converts to material points. Valuable stuff or items with strong sentiments yield more.”

Tried tossing in my self-defense knife. Screen showed “Material Points: 2.” …Wait.

“That’s tiny.”

Even the cheapest tools need hundreds of points—high-end ones thousands or five digits.

“You can convert demon god medals to points too… but wasteful right now, so skip it.”

“Gotta grind and save up…”

But hey, think of it as a handy trash bin.

From now on, I’ll dump useless junk here regularly…

“Got the workshop for crafting, prison functions down. But… how do I actually capture prisoners?”

Without snagging specific targets, the prison’s pointless.

Dragging them to my room and through the mirror like “okay, into the cell” sounded way too tough. Impossible, really.

As if reading my mind, Mirea Moon looked up at me, eyes narrowing.

“That’s where the Demon King Talent comes in.”

“Right, haven’t heard about that yet.”

“You currently have two abilities. Conquest Ejaculation 〈Rauniira〉 and Activation Incantation 〈Rayword〉.”