Chapter 27 Ranking up with Synthesis!
Edited by: Kanaa-senpai
The day after I finished my manor, I got to work on the aircraft upgrades as planned. I wanted to transform it into something resembling a commercial airliner, capable of carrying dozens of people. To pull that off, I needed a high-efficiency, high-output wind Magic Tool¹. Manual power was out of the question for something on this scale.
With that in mind, I channeled a massive amount of Mana² into a Vulpine-type³ monster corpse, Processing⁴ it into a tool. The result was a device that could summon tornadoes. The wind was powerful, sure, but it wasn’t what I needed. I just wanted a simple, directed jet of air. If I was mounting it inside a cylinder to create thrust, I didn’t need multidirectional flow. My priority was Mana efficiency. At the current consumption rate, running several of these at once would drain me dry in ten minutes flat.
”This is going to be rough,” I muttered. I wondered if I would get better results by processing multiple corpses at once.
I was about to drag ten corpses into the processing slot, but on a whim, I decided to try scaling them up via Synthesis⁵ first. Maybe a change in rank would change their properties. I merged ten corpses, and a star icon appeared at the bottom of the frame.
”Wait… could this be!?”
I was on the edge of my seat. If this followed typical game logic, a rank-up usually meant a rarity jump or a limit break once you hit a certain number of stars. Caught up in the hype, I started shoving Vulpine corpses into the Synthesis hopper. The mark didn’t change, though. It looked like a one-star rank only cost three bodies, but even after dumping in a hundred more, nothing happened. Well, if the first jump only cost three, the ceiling for this tier must be low, I thought.
Assuming I had hit a dead end, I tried a different approach. I crafted ten one-star corpses and synthesized those together. Two two-star corpses appeared.
”Okay, I get the math now.” Once I saw the pattern, I churned out ten more and merged them. It took five one-star units to make a single two-star.
Since I had plenty of stock, I started adding them one by one to find the next break. At ten bodies, I hit three stars. To break it down: three base corpses for one star, five of those for two stars, and ten of those for three stars. That meant a single three-star monster required a staggering one hundred and fifty base corpses.
If the next jump is just four stars, I’m going to run out of materials, I thought. “Come on, give me something good!” I prayed as I hit the button. After ten more bodies, the display finally shifted. The stars vanished, and the monster’s icon transformed.
”Jackpot! An evolved species!”
I gave the girls a quick heads-up so I wouldn’t startle them, then summoned the corpse outside. What appeared was a Vulpine-type that had ballooned to over ten times its original size, looking incredibly fierce and powerful.
”Good god…” Lisha said, recoiling with the others.
”If something like that attacked a town, it would be a total massacre,” Lisha the former guildmaster remarked, her voice hollow.
”Anyway,” I said, pivoting back to my goal. I returned to the Magic Tool creation, focusing my Mana with intent this time. Just a strong, focused blast of air. I want maximum thrust with minimum drain, I visualized.
This was the equivalent of fifteen hundred Vulpine corpses. I couldn’t afford to waste this. I poured every bit of Mana I had into it, wishing for efficiency over raw power. I felt a massive amount of pushback, as if the world itself was resisting the creation. But if I could still pour Mana in, it meant the system allowed it.
I kept pushing until the next thing I knew, I was in bed. I had passed out from Mana depletion again. Even though my capacity had increased during the last Subjugation⁶, it still wasn’t enough. I had been out for a while and felt refreshed, so I got back to work. I finally finished the tool just as my Mana hit the red for the second time.
When I tested it outside, the efficiency was incredible. Even on the lowest setting, the backwash sent the girls’ skirts fluttering. I tried it again. They flipped right up. I was about to go for a third “test” when Lisha stopped me.
”If you want to flip our skirts so badly, please just use your hands,” Lisha said with a sigh. Apparently, even from a distance, the wind was so strong they were afraid of being blown away.
Despite barely feeling any Mana drain, it was putting out enough force to send people flying. Yeah, this will work. I was ready to keep going, but Charlotte blocked my path.
”No! Absolutely not!” Charlotte said.
”Aww, come on… just a little more!” I replied.
”No! If you really want to work yourself to death, you’ll have to go through me first!” Charlotte cried.
”Oh? Is that a challenge? You’re on!” I said.
I stood up and pulled Charlotte into my arms.
”Wait! You can’t just take Charlotte! I’m worried about you too…” Shirley said.
”I agree,” Shirley added with a mischievous smile. “I think I’ll join in. Even if you ‘defeat’ all of us right now, we’ll be fine, won’t we?”
They knew a little Mana exhaustion wouldn’t kill me, but seeing me drop like a stone was bad for their hearts. Plus, they clearly wanted some quality time. Charlotte didn’t say it, but her face was a dead giveaway.
”Well, if you’re all so sure I’m going to win… don’t say I didn’t warn you,” I said.
I carried them off to the bedroom and, as promised, defeated the whole group. Shirley put up a hell of a fight, but she was so cute it was more of a reward than a struggle.
By the time we were finished, enough time had passed for my Mana to recover to a decent level. I wanted to get moving as soon as possible, so I went to start synthesizing more Vulpines – I would need more than one engine, after all – but my hand stopped when I noticed a new Recipe⁷ had been added.
Wait, I haven’t actually made anything from the Recipe tab yet.
I opened it up and clicked the Vulpine icon. It only listed a magic stone as a requirement. Huh… I don’t need the whole corpse? I checked a few others. The Pseudo-bat⁸ recipe still required wings, so it varied by item. I tried pulling just the magic stones – fifteen hundred of them – and for some reason, I ended up with three evolved units.
”Whoa… Recipes are broken. I don’t even have to go out and farm more.”
The Mana cost was also significantly lower. Maybe the initial development is what’s expensive? Regardless, if the result was the same, there was no reason not to use the Recipe. This was a massive lifesaver.
Feeling confident we could start our journey tomorrow, I dove into the final assembly. I decided to move past the bat-wing aesthetic and used materials from a black, sphere-shaped inorganic monster for the hull. It was lighter than iron but heavier than the previous build. With the new engine power, it wouldn’t be an issue – plus, a plane that is too light can be unstable.
I kept at it until the new model was finished: a custom job powered by thousands of Vulpine magic stones. I was dying to test it, but I called it a night and went to sleep.
The next day was the maiden voyage.
When I pulled it out of my Inventory⁹, it was huge – way bigger than I had envisioned. My old plane looked like a toy next to it. It had a sleek, glossy black body that looked more like a private jet than a fantasy contraption.
I took it for a solo spin first, and it was so smooth I started laughing. I could barely feel the Mana drain. If we took turns powering it, we could stay airborne for hours. I headed back and picked up the girls; the plane took off effortlessly even with the extra weight.
”Check out this stability! Isn’t it great?” I asked.
Before, I was pedaling for my life while getting tossed around by every breeze. Now, I was just sitting back and holding the controls.
”Wow… it’s totally different,” Charlotte said, her eyes sparkling. She was already pacing around the cabin. “It’s so steady, I don’t feel like I’m being thrown around at all!”
”Careful, stay seated while we’re moving,” I cautioned before turning to Lisha to discuss our route. “So, if we head toward the uncharted territories, we’re going to run into a ton of monsters, right?”
”I mean, yes… but you absolutely cannot do that,” Lisha replied firmly. “At least, not like this. The only reason it’s safe to fly right now is because there are no flying monsters near human settlements.”
”Wait… oh. Right. Flying monsters exist. Duh.” I felt like an idiot. I had completely blanked on that. “But what do you mean by ‘where people are’?”
Lisha explained that because flying monsters are such a threat, humans actively hunt them down and clear them out of any inhabited areas. Trade routes and towns are specifically mapped to avoid monster nests. The only flying monsters that pop up in human lands are weaklings that nobody bothers talking about.
”Wait, there are really things that big in the sky?” Charlotte asked, looking worried.
”Oh, definitely,” Shirley chimed in. “A stray once attacked my village. Wild monsters will almost always attack humans. You just don’t see them unless you’re right on the edge of the frontier.”
That made sense. Since only the occasional stray made it into the interior, regular townspeople didn’t really know the danger.
”She’s right,” I muttered. “If we ran into something up here, we’d be sitting ducks.”
This was just a plane, after all. No weapons. If something attacked us, we were just a big, slow target. I could try to summon a massive wall of thorns in its path, but that was a gamble. I was glad Lisha brought it up. My to-do list just got longer.
”Alright, for now, let’s stick to areas where the ground monsters are strong but the skies are clear. I don’t think we’ve reached our level cap yet.”
”I don’t know about that,” Shirley teased. “Charlotte and I are probably the highest-level non-combat classes in history by now.”
”Doesn’t matter,” I said, my voice turning serious. “The starting line is when we’ve pulled so far ahead that nobody can touch us. I’m not going to risk my family getting hurt just because I want to settle some old grudge.”
Being strong enough to win a fair fight wasn’t enough. We needed to be at the point where even a surprise attack or a country’s entire army only felt like a minor inconvenience. In a world with Binding Magic¹⁰ and god knows what else, I was going to make sure we stayed on the right side of safety.
As soon as I said that, Lisha and Charlotte practically tackled me. Shirley was right there too, gripping my hand with both of hers and staring me down with an intensity that made my skin crawl – in a good way.
”Hey, we’re mid-flight!” I yelled. “If you guys make me want to pin you down, who’s going to fly this thing!?”
”But… Ibuki-sama,” Lisha pouted, “you can’t just say something that wonderful and expect us to stay still…”
”Look, I just said you were important to me. That’s all.”
”My Master, who is more precious to me than anything…” Shirley whispered, her breath hot against my ear. “Hearing those words is the greatest happiness of all…”
Cut it out, Shirley… stop pressing my hand against your chest! I was going to end up taking my other hand off the stick at this rate. And Charlotte? Seriously, stop grabbing my c**k!
”Anyway, where the hell are we supposed to be going!?” I barked, trying to regain some semblance of control. “We’re burning Mana¹¹ for nothing!”
”Muu… couldn’t we just let someone else handle the piloting?” Charlotte suggested. “Well, if we’re heading toward Hasshi Village, I have a pretty good idea of what lives in those woods…”
The idea was tempting, but if I let someone else fly, we would definitely end up doing something “naughty” before we even saw a monster. I wondered if she was worried about hunting near Hasshi Village. If we wiped out the local population, the villagers might call us liars later. Still, I didn’t have any better leads.
”Fine, let’s head toward Hasshi Village,” I decided. “We’re already pointed that way. At this speed, we’ll be there in a flash.”
Lisha clearly had mixed feelings about going back toward her old stomping grounds, but leveling everyone up was the priority. We weren’t actually visiting the village, so she’d just have to deal with it.
I was also a little curious about the Orcs. Even though that ‘Sword Mountain’ was pure Mithril¹² now, I didn’t want to pick a fight without a reason. I’d ignore them for now. I already had more meat than I knew what to do with – and thanks to my storage, it wasn’t like it was going to rot.
We kept talking as the landscape blurred beneath us. Before I knew it, we’d arrived. Our target: the Treants.
When I’d mentioned needing lumber to restock what I’d used for the house, the girls pointed me toward these tree monsters. Apparently, they were prized for making staves and bows because the wood was incredibly durable. A high-value resource for any crafter.
I definitely wanted a piece of that action. We touched down in the mountains near Yada Village. After circling for recon, I found a wide enough clearing and executed a specialized landing.
I surged up from a low-altitude run, pulling the nose vertical until the craft nearly stalled. At that moment of zero-velocity, I yanked a massive parachute out of my Storage¹³. We rocked violently until the chute caught, but we drifted down perfectly. Compared to my usual rough landings, this was pure luxury.
”Wow… that was actually easy,” Charlotte said, sounding relieved.
”Right? Let’s make this the standard,” I replied. “I’m done with the bone-shaking crashes.”
We climbed out halfway up the mountain. Lisha was already looking anxious, her eyes darting toward the treeline.
”Treants are the kind of monsters that take root…” she murmured. “Do you really think they’ll fall into a simple pitfall?”
”Heh heh heh. Lisha-kun…” I let out a low chuckle. “Since when were you under the illusion that pitfalls were my only trick?”
”Eh…?”
While she stood there with a blank expression, I shouted, “Just watch!” and started leveling the ground with a smug grin.
”This shall be our base!” I declared. With a heavy thud, my house appeared right at the edge of the cliff.
”Wait, you’re putting it here!?” Olivia-san cried out.
”Yep. I’ve reinforced the foundation and fused the stone blocks. It’s not going anywhere.”
Since the stone foundations were deep-linked into the mountain’s crust, there was zero chance of a landslide taking us down.
”But… is it safe? The defense here seems…” Olivia-san trailed off, looking at the open air.
”Just you watch!” I gave her my best “I have a plan” face and started stacking stone blocks into a massive maze. The walls towered twenty meters high. From the top of the stairs, you could see a 180-degree zigzag path that forced anything approaching to take the longest route possible. Naturally, the path didn’t actually lead to the house. I’d lure them in with Mana, but the “bridge” was a lie.
”See? Safe as houses,” I said.
”I mean… I see that they can’t get to us,” Olivia-san said, clearly lost. “But how do we fight? If we’re sniping from up here, I’ll need a bow, or this is going to be impossible.”
”Nn… oh, right. You’re an Archer,” I realized. “But you don’t actually need to fight.”
”Eh…?”
I ignored her and began installing the ceiling over the maze. It wasn’t just a roof. Along the corridors, I installed dozens of three-bladed propellers, each tipped with a massive circular saw made of reinforced Mithril. I hooked them up to a variation of the Wind Magic Tool¹⁴ I’d built yesterday.
The design was simple: I’d feed them Mana, the propellers would spin slowly, and the Mithril saws at the tips would scream at ultra-high speeds. They could slice through iron like it was wet paper. One saw per path was enough, but I put three in a row just to be safe.
Since Treants moved like molasses, they couldn’t possibly dodge. If anything survived the blades, they’d walk straight into a Flame Magic Tool trap. Since fire was their weakness, I went all out. I lined the walls with flamethrowers.
The Mana consumption was high for the fire, so I hoped the saws would do most of the heavy lifting. I wanted the wood intact, after all. To make sure we could enjoy the “show,” I made the ceiling out of reinforced glass with steel frames.
”Obviously, do NOT go near those spinning blades,” I warned. “Even if you’re curious, stay behind the safety fence.”
I ran a test. I flowed a bit of Mana into the system, and the propellers began to turn with a deafening whirrrrrrrrr. At a Treant’s size, they’d be shredded.
Next, I pulsed the flamethrowers. The entire passage was instantly swallowed by a sea of fire. Yeah, if I leave that on too long, the heat will be unbearable. Oh well, I can just use Mana Sensing¹⁵ to keep track of the kill count.
I quickly finished the rest of the layout. I dug an emergency tunnel in front of the house – too small for a monster to fit through, but perfect for a quick escape. Even if they bypassed the traps, they couldn’t punch through solid stone easily.
”Phew. Okay, this is a brand-new setup, so there might be some bugs,” I said, turning to the group. “If I give an order, move fast. Got it?”
”Yes!” they shouted in unison, finally looking like a real team.
”Alright, let’s get this party started.”
I started chucking Cocoons¹⁶ into the woods to draw them in. But man… these things were slow. Even with Mana Sensing, I could see them just lumbering along at a snail’s pace.
”Hey, Lisha… are Treants actually dangerous?”
”E-eh? Yes! Their reach is incredible, and they attack with a flurry of whip-like branches that no shield can block!”
Ah, the “Area of Effect” type.
”So they’re meant to be taken out from a distance?”
”Well, they have ranged attacks too,” she added quickly. “They fire wooden arrows. Even though they’re slow, they’re deadly if a front-liner isn’t there to pin them down. Plus, they can camouflage themselves perfectly in the forest…”
”Got it. Well, now we just play the waiting game. For now, let’s go relax in the house.”
”Whaaaat!?”
I mean, they were still miles away. Since the girls couldn’t see their locations, I guess the confusion was natural. I explained the plan as we headed inside, settling in to relax while the monsters slowly crawled toward their doom.
—
Summary:
Here’s a polished single-paragraph version merging both summaries into a dynamic arc of innovation, exploration, and looming peril, with smooth progression and exact adherence to the details:
***
The protagonist unlocks the Synthesis mechanic, elevating monster corpses into elite High Species for crafting a supremely efficient engine that powers a grander, new aircraft; after a cozy interlude with his companions, he test-flies it, uncovering the stealthy aerial monsters lurking in uncharted skies. Pressing onward, Ibuki and his crew trek to the mountains near Yada Village to harvest Treants for premium lumber, where he flexes his engineering genius by assembling a vertical-landing craft and an enormous stone maze rigged with lethal traps—the chapter closes with the group hunkered in their house, poised as the ponderous monsters lumber toward the fatal gauntlet.
—
Trivia:
- Synthesis requires exponential amounts of materials: 150 base corpses for one 3-star unit.
- High Species are considered town-destroying threats by former Guild Masters.
- The Recipe system is more efficient than manual crafting, sometimes bypassing corpse requirements for just magic stones.
- Flying monsters are rare in human territory because they are systematically exterminated, not because they don’t exist.
- The protagonist is motivated by a ‘grudge’ but prioritizes the absolute safety of his ‘family’ over revenge.
- Ibuki specifically chose a cliff-side location for the house to prevent ground-based flanking.
- The ‘Sword Mountain’ mention recalls earlier events where an entire mountain was converted to Mithril.
- Treants are not just lumber; they are dangerous ‘Area of Effect’ monsters with camouflage and ranged wood-arrow attacks.
- The stone foundations are magically fused together, not just stacked.
- Ibuki is using ‘Cocoons’ as a lure, which is a specific item from his inventory/crafting
—
Character Insight:
The protagonist demonstrates a shift from a hobbyist crafter to a protective leader, obsessed with ‘over-leveling’ his companions to ensure they are never at risk. Lisha shows her experience by grounding the group’s excitement with cold reality.
Ibuki is becoming increasingly comfortable with his ‘cheat’ powers, using them for convenience (like the parachute landing) rather than just survival. Olivia-san serves as the ‘straight man,’ highlighting how absurd Ibuki’s modern logic is to a native of this fantasy world.
—
Behind the Scenes:
The author uses ‘Narou’ tropes (numerical power scaling and recipe unlocks) to justify the sudden jump in the party’s mobility and resources.
The ‘illusion’ line is a direct nod to classic shonen tropes (e.g., Bleach), emphasizing the protagonist’s meta-awareness of his own power.
—
TL Notes:
Notes:
• Lisha – Mature native girl with killer curves, huge rack, brown long haired and big-sis vibes—polite, shy homebody type who calls banging Ibuki a
• Charlotte – Short, skinny late‑teen slave girl with messy brown hair, feline eyes, and a soft, slender body. Was an Ex‑Level 8 farmer, now Level 10 and bound to Ibuki, who she calls “Master” and calls herself his wife. Wears rags at first, then pretty clothes he makes, plus his bat‑wing hairband. Blushy, clingy, protective, and easily emotional, she follows him on runs, fights, and flights while always worrying if she’s useful enough.
• Shirley – 14yo ex-knight family swordswoman, Ibuki’s 2nd slave (8-gold scapegoat from Karl), rocking long red hair, dignified cool beauty in tight white dress—shocked by the chill vibes at first. Fanatic loyalist, weapon tester, security guard, blunt questioner of his slave game, one of his 3 wives, combat/sales pro but can’t cook.
• Ibuki – Broke high‑schooler from Earth who got tossed into another world with the “Crafter” class he first thought was useless—turns out it’s totally busted. Black‑haired, germaphobic, and low‑key bitter but sharp as hell. Uses Synthesis, Processing, and Inventory skills to survive, craft gear, and haul loot while exploring. Currently a Level 10 otherworlder, wielding a stone axe, traveling the frontier forest with Charlotte, and just trying to stay alive long enough to find a bit of peace.
• Olivia – A member of the group who asks about the ‘weird’ monster types with some technical/magic-tech knowledge who is stunned by the efficiency of Ibuki’s skills. Archer. Eldest of the new recruits. Height approx 160cm (5’3). Deep blue-black hair. Calm demeanor.
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Edited by Kanaa-senpai.
Thanks for reading.
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