'Unfortunately, that smartphone has no records of your family or friends from your former life. Naturally, you can't access the internet, either.'
"Then what's even the point of having this thing...?"
Smartphone in hand, I groaned and muttered.
'That phone might be useful for dungeon creation, so I let you keep it. Asking you to build a dungeon from scratch, feeling your way through the magic, seemed like a lot to dump on you right away.'
"…Huh? Well, I guess that's true, but… what does that have to do with this phone?"
'There should be an app installed. Go ahead and launch it.'
I checked the apps. There was indeed just one. Its name? Dungeon Maker. Hold on—is this seriously okay!? I mean, I was the one who said copyright wasn't relevant here, but still…
Ignoring the cold sweat beading on my forehead as best I could, I launched Dungeon Maker.
'Ah, looks like it's started up. Building dungeons is simple. Just create a dungeon in that app, and save it. Modifications work the same way. It takes time and effort, sure, but you could even make a dungeon that changes its layout every time someone enters.'
"Um..."
On the screen, a lone white square appeared. This must be the room I'm standing in. Below it, there were icons labeled "Customize," "Save," and "Status." It looked just like a game.
"…Isn't this a little too easy?"
Just to test it out, I opened the Customize menu and selected "Corridor," extending it from the room.
Nothing happened.
Guess it's not that simple, huh.
'Well, the land you'll be working with is vast. Without this level of simplification, I doubt you'd manage at all. Oh—and the structure won't change unless you hit 'Save.''
"Right, that makes sense…"
Building walls by hand, digging pitfalls, setting traps… yeah, that's impossible on my own! God, thank you for this.
…Wait, hold on.
Are we actually moving forward with that big request!?
I tapped "Save" on a whim. A confirmation screen appeared.
[Save data?]
[Yes] [No]
I tapped "Yes" for now. Having to confirm every time is tedious, but without this screen, one mistap could immediately save over everything. That'd be a nightmare.
From now on, whenever I press this "Yes" button, I need to double-check I'm not making a mistake.
A strange vibration rippled through the entire stone room, and with a squelching sound, the stone wall shifted—revealing a passageway. Not that it really matters, but… that looked pretty gross.
Still, this is way too easy.
Is it really okay for things to be this simple…?
'I see you've confirmed it works. That smartphone contains a portion of my power. Enough to build a dungeon the size of, say, Blood Tears of the Demon Lord, but once that runs out, you'll have to replenish it yourself. Well then. Here's your first blessing. Open up the 'Status' menu.'
Following instructions, I tapped "Status." No confirmation screen this time—it smoothly displayed what appeared to be my stats.
[text]
[Copy]
[Download]
[NAME]
"Dragon Quest!?"1
And starting gear, too. That gray-and-purple relic. The one that guzzled four AA batteries like it was nothing.2
Just the fact that it's all in kana shows how shockingly low-spec it is—and there's probably a character limit, too. Look at that equipment section. My smartphone—the device sometimes called a "palm-sized PC"—must be crying right now.
'Looks like you've confirmed it. Well then, first, I'll grant you the 'Spring of Magic Power.''
The moment God said that, my MP—which had been a measly 2—shot up to 10002 in an instant.
I mean… okay. God's God. Those insane numbers just come with the territory, right? My base stats are all single digits, but that just means my growth potential is huge. I'm the Demon Lord, after all. It's fine, right?
Incidentally, a skill called "Spring of Magic Power" appeared in the Skill section. Is this some kind of jab at me for worrying about the app's character limit?
'Good. Looks like you received the blessing without issue. The 'Spring of Magic Power' is an ultra-rare skill that amplifies the owner's magic, increases their recovery rate, and even stores a certain amount of MP. It's so rare you might find one user in a thousand years. And you get additional blessings from me on top of that? You're Super Hyper Ultra Lucky!'3
Are you a kindergartener or something?
Still, that does sound like a useful skill. If I get some powerful magic later, I'll be able to spam it without worrying about MP.
'Now, the next blessing is called 'Divine Protection.' As the name suggests, it's my protection. The effects are: increased HP, increased recovery power, increased recovery speed, and damage reduction—a truly cheating skill!! And by the way, no one has ever received this blessing before. You're the first. Genuinely. Pretty amazing, right?'
Why is God so hyped right now?
This feels like one of those "The Best Protection Ever: My Ultimate Design!" deals.4 Are you sure this is okay? Isn't this going to break the game balance?
Though I can't deny—watching my HP jump all the way to 100010 made me genuinely happy.
…Heh heh heh. HAHAHAHAHA!!
One hundred thousand and ten. At this rate, am I not gonna die?
Okay, I can't laugh at God's excitement anymore—because I'm having a blast right now, too.
Game balance broken? Cheat-filled convenient plot? So what!?
This isn't a game!!
To survive, you use every means at your disposal!! That's only natural!! Anyone who complains can enter the Unde-… Martial Arts Tournament without any magical items first!!5 You'd have to be as tough as that Baki guy to pull that off, so good luck!!
"God! What's next!?"
'Hehehe, no need to rush. Next up is what you've been waiting for—magic!!'
"Ooh!! Whoa!! For real!? I can use magic!?"
'Yes. And with the 'Spring of Magic Power,' I daresay it wouldn't be an exaggeration to call you the world's strongest mage from today onward.'
"THAT'S AWESOME!! God, thank you!!"
'Not at all. I'm the one asking you for a favor. This is the least I can do.'
Looking back now, I think my skyrocketing excitement got the better of me. I'd gone a little stupid.
If I had the power to travel back in time, I'd return to this moment every minute on the dot—and douse past me with a bucket of ice water.
Because this was where my weakest Demon Lord life truly began.
Summary:
The protagonist receives a smartphone with a dungeon-building app and discovers it functions like a retro RPG game interface. God grants him two overpowered blessings—the Spring of Magic Power and Divine Protection—that skyrocket his stats to absurd levels. His excitement builds to manic euphoria as he realizes he might be functionally immortal, only for his future self to reflect that this was the beginning of his "weakest" Demon Lord life, implying that his overwhelming power will somehow lead to suffering.
Trivia:
The protagonist was the one who dismissed copyright concerns about the Dungeon Maker app, showing his genre-savvy self-awareness.
The smartphone displays data in kana-only text like an old Game Boy, which the protagonist finds hilariously primitive.
The confirmation screen before saving is described as annoying but necessary, showing the protagonist's practical caution despite his excitement.
The Spring of Magic Power skill is called "ultra-rare" and "once in a thousand years," but God immediately gives it to the protagonist without hesitation.
God claims no one has ever received the Divine Protection blessing before, making the protagonist the first and only recipient.
The protagonist's HP jumps from 10 to 100010—a 10,000x increase—which triggers his manic laughter and realization that he might not die.
The Baki reference implies that complaining about cheat powers would require surviving an impossible martial arts tournament without weapons, framing any criticism as absurd.
God's childish enthusiasm ("Super Hyper Ultra Lucky!") contrasts comically with their cosmic status and ancient age.
The final paragraph is written from a future perspective, confirming that the protagonist will later regret his naive excitement.
The term "weakest" in the final line is ironic—after receiving godlike stats, he still considers himself the weakest Demon Lord, suggesting his power is meaningless in context.
Translation Notes:
1 ↩ The original Japanese uses a censorship circle to parody "Dragon Quest" (ドラゴンクエスト), Japan's most iconic RPG franchise. The reference evokes a specific nostalgic gaming memory for Japanese readers.
2 ↩ The "gray-and-purple relic" and "four AA batteries" reference the original Nintendo Game Boy (gray body, purple buttons), which used 4 AA batteries. The joke is that this "smartphone" displays data like a primitive 1980s handheld.
3 ↩ The Japanese "超ハイパーウルトララッキー" is intentionally childish and over-the-top, emphasizing God's playful, almost mocking enthusiasm. The translation preserves this exaggerated, childlike quality.
4 ↩ This references a Japanese internet meme format "ぼくがかんがえたさいきょうの..." where children create overpowered self-insert characters. The translation aims to capture that same childish, self-congratulatory tone.
5 ↩ This parodies the "Underground Martial Arts Tournament" from the manga Baki the Grappler. The ellipsis and censor effect are preserved to maintain the comedic reference. The "Baki" mention clarifies the specific character (Baki Hanma) known for extreme physical abilities without weapons.
Notes:
• God - An ancient, divine guide to the reincarnated protagonist who oversees departed souls. Though appearing only as a voice, this paternalistic yet playful deity speaks with casual, modern exasperation. While acting as a benefactor who grants power and protection, they maintain a rational, persuasive demeanor, frequently apologizing for their intimidating presence while seeking a favor in return.