Chapter 7 The Great ‘Tremble-D✱✱do-Buddy’ Plan is a Go
Edited by: Kanaa-senpai
It had been only a few days since the adventurer Elf regular got his ‘solo session’ counseling from my slave, Lily, but I was already waist-deep in a new product design.
”Master, what are you making today?” Lily sweetly inquired.
”Kukuku, prepare to be amazed! I’ve finally hit upon a way to develop the ‘Tremble-D**do-Buddy’!” I declared, my voice booming with a touch of the dramatic flair I enjoyed.
”Oh, finally! Is it really happening?!” Lily cheered, bringing her hands together and clapping enthusiastically over her chest. I felt a tremendous rush of pride and satisfaction. The ‘Tremble-D**do-Buddy,’ as the name suggests, is simply a D**do that vibrates—in other words, a vibrator.
When I first opened my magic tool shop, Harvest, I’d been planning a few items besides the love potions. I’d even told Lily about one of those ideas: adult magic tools with a vibration function. Vibrators, rotors, electric massagers (denma)¹—these were products that sold like crazy back in my old world. I figured if I could pull it off here, I’d be swimming in profit. But, how to make that vibration happen in a world with no electricity was the absolute sticking point.
”So, so, how are you going to make the ‘D**do-Buddy’ shake like that?!” she pressed, her voice trembling with excitement.
”Hmph, calm down, Lily, my girl. I’ll tell you right now,” I chided, my voice affected and theatrical, as I pulled out two distinct materials for her to see. One was Metag Stone², which is mined in the northern mountains of the capital city, Canaria. The other was a fragment of a Pororo Snail³ shell.
”Just watch this, now. When you bring the Metag Stone close to this Pororo Snail shell…”
Vvvrrrrrrrrr! Vvvrrrrrrrrr! The Pororo Snail shell in my hand began to tremor in short, rapid bursts, shaking my entire arm along with it. Lily’s face instantly brightened, her eyes wide with unadulterated delight.
”Amazing, amazing! That’s really incredible, Master!” she exclaimed.
”Hmph-hmm! I know, right? Told ya!” I crowed, puffing up my chest.
Lily hugged my arm, pressing her chest against me as she complimented me. Her cheeks were faintly flushed, almost as if she were inviting me to do something else entirely. I totally got it; I’d almost done a little victory dance myself when I first stumbled on this reaction.
”I remember the Pororo Snail, didn’t we buy it thinking its slime might be useful for a lubricant?” she murmured.
”Yeah, that’s the one. I thought the thick liquid it secretes could work for lotion, but who knew the shell itself would turn out to be the key to a vibrator…”
The Pororo Snail is, just as its name suggests, a small monster similar to a common snail. When I say small, it’s still about the size of a large dog, so it’s pretty creepy and frightening, but any monster smaller than a human is generally considered ‘small.’ Its main trick is secreting large drops of thick slime from its face.
They say it got the name Pororo because it looks like it’s crying little tear-drops, but honestly, you’d have to ask a monster scholar for the specifics. Anyway, I was after the slime initially, but one day I saw the shells getting tossed out and just brought one back on a whim. That shell just happened to react with the Metag Stone I bought somewhere else, and here we are.
”Whoa, it’s really trembling!”
Lily took the two materials from me and started playing, bringing them together and pulling them apart to watch the vibration start and stop.
Her face was even redder than before. She was definitely imagining applying that vibration to her sensitive parts, the dear.
”This is great! Master, let’s turn this into a product right away!” she urged.
”Hold your horses, now. Before that, I want to get a decent amount of the materials first. Prototypes need a lot of raw material, and mass production will need even more,” I cautioned.
”I see…. So, should we head straight to the Adventurer’s Guild to post a request?”
”Yeah, let’s go right now. Lily, get ready to head out.”
”Yes!” she replied, full of energy, and began rummaging through a shelf where she kept her belongings. She was, as always, going commando under that apron while in the shop, but she always puts on underwear before heading out. She claims, “I’ve got no business showing anything to anyone but my Master.”
Some might call that virtuous for a slave; others might think, ‘How desperate is she to try and tempt me?’ Me? Well, I just think it’s cute, in all the ways that matter.
”All set!”
”Alright, let’s roll.”
”Yes!” She naturally looped her arm through mine, wrapping her own tightly around it. It makes walking a bit awkward lately, but there was no way I’d shake her off. And with that, we headed toward the Adventurer’s Guild.
* * *
The Adventurer’s Guild.
It’s the kingdom-approved organization that brings together the independent adventurers who make a living by hunting monsters and collecting rare items. It’s also the place that kept me alive when I was first dumped into this world.
It’s conveniently set up with an inn attached.
Although the rooms are cheap, they only have basic beds, so any adventurer who can afford better usually doesn’t stick around. The first floor is a tavern, and sure enough, a bunch of ruffians were already getting hammered in the middle of the day.
”Yo! Kento, ain’t that Kento?! Long time no see, you old dog, thought you finally kicked the bucket!”
”Whoa, don’t you know, buddy? Kento’s a respectable magic shop owner now! Look, he’s even got a cute slave with him!”
”Lily, sweetie! If you ever get bored of that jerk Kento, I’ll buy you in a heartbeat!”
The moment we walked into the guild, the rowdy thugs started shouting at us. They’ve got foul mouths and mean faces, but underneath all that, they’re all husbands and fathers.
They were also the good-natured guys who bought me food and taught me the basics of adventuring when I was nearly dead. So, I replied to them in their own style, just like always.
”Shut your traps, you good-for-nothin’ bums! Drinking in the middle of the day—get to work! And forget it, Lily’s mine! I’ll tell Aki-neesan⁴ on you, Carl!”
”Anything but that, man!”
”GYAHAHAHAHAHA!”
Dirty words for dirty words, shouting back when shouted at. It was our usual routine, and everyone laughed whether it was actually funny or not. That was the adventurer way of life.
It suits their skin, I guess, but when you’re fighting dangerous beasts, you can’t worry about fancy language, and you sure can’t let tension stop you. You laugh it off and blow it away, they told me. They truly were good guys who raised me as an adventurer.
By the way, Aki-neesan is Carl, the third thug’s, wife.
She was apparently a formidable adventurer herself back in the day, but now she’s a wonderful, kind Elder Sister figure. I owe her a lot, too; I can’t count how many times her special, thick soup saved my life.
”Hee-hee! Hot stuff, ain’t ya? Got another material-gathering request today?”
”Yeah, I need to stock up on Pororo Snail shells.”
”Now that’s a strange thing to want. Well, okay, I’ll take that request the second it’s posted, you hear?” Balliston, Thug B, whose face looked like he’d mug a person in a dark alley, chimed in.
”That helps. Don’t get your hopes up on the fee, though.”
”I ain’t fallen so low I gotta freeload off you, you pest!”
Brushing him off, we headed for the reception desk tucked away in the back of the tavern.
I couldn’t shake the feeling that Lily’s body, which was still wrapped around my arm, was getting a little warm. I figured I should probably prepare myself for tonight.
At the counter, a tanned, red-haired Elder Sister with a wonderful physique was looking at us with a gentle smile. Wait, the Elder Sister I mentioned before—Aki-neesan—and this Elder Sister are completely different!
This one… she just oozes so much allure that I can only describe her as an Elder Sister.
”Well hello there, Kento-kun. Long time no see, dear.”
”Hello, Marm-san. It has been a while.”
Marm-san is the guild’s poster girl. She’s probably younger than me, but she still calls me ‘Kento-kun,’ and I get so flustered that I always end up using polite language with her. I’m a total sucker for beautiful Elder Sisters.
Besides, she saw me at my lowest point when I first arrived, picking nothing but simple herbs. She never mocked me and was always kind when buying my materials and worried about me. She’s one of my benefactors, and I’ll probably be indebted to her forever.
As I was staring dreamily into her tanned cleavage, a sharp pinch dug into my side.
”What was that for…?” I whispered. “Nothing,” Lily mumbled, looking away.
”Hehe. I’m sorry, Lily dear, but I wasn’t planning on taking your Master away and eating him up, so don’t worry, okay?”
”I am not worried. I don’t care who Master sees or what kind of relationship he has. It’s just… the way his nose was twitching was disgusting, that’s all…” Lily pouted.
”Oh, my.” Marm smiled wryly.
Hah, it’s tough being a man in demand…. Ouch, that hurts, Lily!
I’m sorry, I wasn’t getting too full of myself! I endured her silent pinching attack, all while Marm-san watched us with an amused, affectionate look.
”So, what can I do for you today? Thinking of coming back as an adventurer?”
”No way. Just the usual requests. Oh, and if the last one’s done, I’ll take that payment, too.”
”Let’s see, the last one was for Red Slime⁵ fluid, wasn’t it?”
”Yes, my stock is getting low. If you haven’t collected enough, I’ll put up an extra request. I don’t mind increasing the reward.”
”Mmm, looks like we’re fine. I’ll prepare it for you to take home later, then.”
”Thank you very much.”
Red Slime fluid is, without a doubt, one of the main components of the ‘D**do-Buddy.’ When you mix it with the sap from an Akanashi Tree, you can make a perfectly realistic ‘D**do-Buddy.’ Choosing the right material for my dildos took quite a bit of effort, but that’s a story for another time. In any case, it was also a necessary ingredient for the ‘Tremble-D**do-Buddy,’ so I was grateful to be able to pick it up on the fly.
”The thanks belong to you, Kento-kun…”
”Huh?”
”The adventurers who are just starting out really love your requests. They’re easy to hunt, you buy them for a decent price, and you even give them cheap healing potions, right? Even after retiring, you’re still working hard for the younger ones. I’m almost tearing up, dear…” Marm-san said, actually wiping her eyes.
Well, I owed them a lot, so I wanted to give back what I could. The truth is, my ‘D**do-Buddy’ was selling so well that I was scrambling for materials and just put up good-paying requests out of desperation, but…
”It’s not like I’m losing money. If it motivates the adventurers, it’s a cheap price to pay,” I demurred.
”Hehe, I’ll take your word for it, then. So, a new request?”
”Yes. I’m looking for Pororo Snail shells…”
I was a bit embarrassed by the praise but was just about to request the materials for the ‘Tremble-D**do-Buddy’ when the guild entrance suddenly erupted into a clamor.
”What’s going on…?”
”Hmm, looks like a celebrity showed up. They’re probably trying to recruit for a party, I bet.” Marm-san, who could see the entrance behind me, mused. Sometimes, adventurers with a ‘Title’ or ‘Nickname’ show up. They’re the real deal—proven by their amazing achievements or their specialized skills, and everyone wants a piece of them.
Of course, sometimes the nicknames are just based on looks or some running joke. My own title, back when I was an adventurer, was a proud one: ‘Kento the Collapsed Vagrant’.
Well… thanks to that, a bunch of people bought me food, so I’m not complaining!
”That green hair and those pointy ears… that must be ‘Tania of the Divine Bow’, a real Elven sharpshooter.”
Marm-san seemed to have recognized the famous name. I turned and strained my eyes, just in time to see the familiar Elf easily fending off the circle of thugs surrounding her.
—
Summary:
Kento, the resourceful owner of the Harvest adult shop, finally cracks the secret to his revolutionary new product, the ‘Tremble-D**do-Buddy,’ a vibrating toy made possible by combining fantasy materials like the Metag Stone and Pororo Snail shell. He and his loyal slave, Lily, head to the rowdy Adventurer’s Guild to post a collection quest for the snail shells.
After some playful, flirtatious banter with the tough-but-kind regulars and the beautiful receptionist, Marm-san, their business is interrupted by the arrival of a famous adventurer, the Elven beauty Tania of the Divine Bow, setting the stage for a new confrontation or alliance in Kento’s isekai life. This chapter mixes lewd comedy with the comfort of community.
—
Character Insight:
The depth of Kento’s self-awareness and personal history shines through in this scene, revealing that the isekai shop owner was once a desperate, low-ranking adventurer who relied on the guild’s rough community for survival. His present-day success is built on a foundation of humility and an enduring respect for the ‘thugs’ and benefactors who kept him alive.
His relationship with Lily is marked by a deep, playful affection and trust, seen in her possessive actions, suggesting a bond far stronger than mere master-slave. Kento is a man driven by both profit and a surprising, low-key gratitude, making him a complex figure in this adult fantasy setting.
—
Behind the Scene:
This scene establishes the mechanical breakthrough for a key line of adult magic tools—vibrating toys—which will drive future plot points by requiring constant material gathering and introducing Kento to more high-profile adventurers like Tania.
The interaction with the guild thugs and Marm-san serves to ground Kento’s character in the fantasy world, showing he is not just an outsider but a known, if odd, member of the community. The focus shifts from the shop’s interior to the guild’s public space to expand the story’s setting.
—
T/L:
1 Denma: A common Japanese abbreviation for a ‘denki massāji ki’ or electric massager, which is often used as a euphemism for a vibrator in adult contexts. ↩
2 Metag Stone: A unique, fictional mineral in the world. The translation note is provided for this invented fantasy item. ↩
3 Pororo Snail: A unique, fictional monster/item in the world. The translation note is provided for this invented fantasy item. ↩
5 Red Slime: A common, fictional monster in this fantasy world. The translation note is provided for this invented fantasy item. ↩
Notes:
• Lily – the sl*ve and primary experiment subject for the magic shop, ‘Harvest.’ She has striking pink hair, Blue eyes, medium breasts, which the Protagonist associates with being ‘wanton’. She has a working knowledge of magic, which she kept hidden from the slave trader.
• Kento – The owner of the magic tool shop ‘Harvest,’ which discretely sells adult goods. He’s a former overworked, ordinary salaryman from modern Japan who was suddenly transported (isekai’d) to this fantasy world. He has dark hair and an unremarkable appearance, typically wearing a plain, slightly suspicious-looking shop owner’s clothes looks like Kazuma Satou from certain series. He has a minimal amount of magic power, enough to craft his specialty items.
• Marm – The attractive, red-haired, tanned receptionist at the Adventurer’s Guild. She wears a uniform that emphasizes her ‘nice body.’ She is kind and acts like a supportive ‘big sister’ figure to Kento. Looks like Mirajane Strauss from certain series.
• Tania – An Elf adventurer who, despite her race’s reputation for low sex drive, is secretly quite passionate. She initially seemed ‘wasted’ (emotionally dry) to her friend Raika, but was easily introduced to the pleasure-items sold at ‘Harvest.’ She is easily embarrassed and attempts to maintain a dignified facade, despite her recent, frequent purchases. She wears practical but light armor over a simple cloth tunic and short pants, highlighting her grace and agility. Her primary relationship is one of friendly senior-junior with Raika.
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Edited by Kanaa-senpai.
Thanks for reading.
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