Demon King After the End-Chapter 32: New Mission

Leon sat at the long wooden table alone, freshly dressed and chewing on some darkbread and roasted beast meat. The castle walls were still half-decorated, and a cold breeze blew in through the open windows. He waved his hand, and the blue translucent panel of the Territory Management System opened up before his eyes.

A new notification blinked at the top.

[New Mission Unlocked – Public Health: Sanitation Crisis]

Your territory has stabilized. Food and shelter are no longer an immediate concern.

Next Objective: Improve the basic hygiene of your people.

➤ Mission Goal: Construct a functioning sewage system for the residential zones.

➤ Reward: +1000 SP, +Territory Popularity, Unlocks Tier 2 Settlement Options

➤ Optional Bonus: Integrate Mana-Purification Node (Additional 250 SP Reward)

Leon frowned. "Sewage system... huh. That’s not exactly the kind of thing I thought I’d be dealing with in another world."

He tapped the panel.

[Mission Description]

The current state of waste disposal is primitive. Common demons are relieving themselves in open fields, near water sources, and in shared community paths. This will lead to outbreaks of disease, pollution of your water supply, and a drop in morale.

Magical users do not contribute to this, but the common populace is vulnerable. Solve this crisis before an outbreak begins.

"...Ugh. So it’s a shithole problem. Literally."

He leaned back, exhaling. He wasn’t a civil engineer. He didn’t even know how plumbing worked back on Earth in detail—pipes, drainage systems, filtration, nothing he could replicate with medieval resources.

But the system expected a solution. And as usual, it offered a shortcut... for a price.

He opened the System Shop and searched under "infrastructure". 𝘧𝓇𝑒𝑒𝑤ℯ𝑏𝓃𝘰𝑣ℯ𝘭.𝘤ℴ𝘮

[Detailed Sewage Blueprint – Fantasy Era Compatible]

Cost: 400 SP

Description: A comprehensive blueprint for a low-maintenance sewage disposal and purification system designed for mana-scarce environments. Includes integration of mana stones, purification runes, and underground channeling structures.

Bonus Effect: Recyclable wastewater can be redirected for irrigation after purification.

Leon didn’t hesitate.

[Purchase Confirmed – 400 SP Deducted]

A set of glowing blueprints downloaded directly into his mind. He closed his eyes, and for a few seconds, it felt like his brain was being stuffed with practical knowledge—rune placements, waste flow angles, venting shafts, even the spacing between communal toilet huts.

When he opened his eyes again, he understood how it would work.

"Holy shit... this is actually doable."

The system didn’t just give him paper plans—it gave him the core idea: rune-based filtration using common mana stones, underground brick tunnels lined with sealing magic to prevent seepage, and open-lid squat toilets built near residences that connected to downward shafts. At the center of the system would be a Mana Purification Node, which would cycle the water through three rune filters and push the cleaned water into a secondary channel for field use.

He summoned his retainers immediately.

A Short While Later – Council Gathering

Inside the stone chamber of the council hall, the air was still. Leon sat at the head of the table, his retainers gathered around him. The flickering light of crystal sconces lined the walls, casting soft shadows across the hardened faces of demons who had seen war, starvation, and near extinction.

None of them spoke.

Over the past month, they had witnessed Leon pull off what most thought impossible. Barren land had turned green. The dead soil now bore crops. Food filled their stomachs. Permanent homes stood where ruins and tents once did. Survivors who had lost all hope now walked with straight backs.

The impossible had become reality under Leon’s rule.

So when he summoned them, they showed up without delay. And now, they sat silently—waiting to hear what came next. Their expressions were serious, focused. There was no doubt in their loyalty now.

Leon looked around the table and spoke plainly.

"We’ve dealt with food and shelter. Now it’s time to deal with something even more dangerous—waste."

The table remained quiet.

"We’re building a sewage system."

There were murmurs. Confused glances. Even Sylviana raised an eyebrow.

"Sew... what?" Brugos scratched his head.

Leon expected the confusion. "Sewage. Waste management. We’re talking about how people relieve themselves—where it goes, how it’s handled."

More puzzled looks. Sylviana arched an elegant brow. "You summoned all of us... to talk about shit?"

Leon smirked. "Yes."

He stood up, grabbing a thick scroll and rolling it across the table. A rough blueprint he’d sketched out from the system plan—a simple schematic of underground channels, rune placements, and waste flow paths.

"This is a rough sewage blueprint I came up with," he said, tapping parts of it. "We’re building an underground waste channel system lined with basic purification enchantments. Waste flows down, gets filtered with mana-infused stones and runes, and clean water comes out the other end. We’ll use that water to irrigate the fields."

The table was quiet.

Zorath’s nostrils flared. Gorran scratched his chin. Kaedor just stared at the sketch. Even Elvera, quick-witted as she was, looked mildly unimpressed.

"This is... not very glamorous," Sylviana finally said, twirling a strand of hair.

"I’m not doing it to be glamorous," Leon said. "I’m doing it to keep people alive."

There were murmurs. Confused glances. Even Sylviana raised an eyebrow.

"Sew... what?" Brugos scratched his head.

Leon expected the confusion. "Sewage. Waste management. We’re talking about how people relieve themselves—where it goes, how it’s handled."

More puzzled looks. Sylviana arched an elegant brow. "You summoned all of us... to talk about shit?"

Leon smirked. "Yes."

He stood up, grabbing a thick scroll and rolling it across the table. A rough blueprint he’d sketched out from the system plan—a simple schematic of underground channels, rune placements, and waste flow paths.

"This is a rough sewage blueprint I came up with," he said, tapping parts of it. "We’re building an underground waste channel system lined with basic purification enchantments. Waste flows down, gets filtered with mana-infused stones and runes, and clean water comes out the other end. We’ll use that water to irrigate the fields."

Gorran grunted, arms crossed. "You want us to... clean shit water and feed it to our crops?"

Leon didn’t flinch. "Not shit water—clean water. Purified by mana, filtered through multiple stages. It’ll be cleaner than the streams around here."

Sylviana tilted her head, unimpressed. "This is... not very glamorous."

"It doesn’t have to be. It just has to work," Leon replied calmly.

Zorath nodded slowly. "Logical. Diseases from filth. Most common demons die in winters from strange fevers. Perhaps... not natural."

Leon pointed at him. "Exactly. And if we fix this, we’ll cut down illness by a lot. People won’t understand now, but they’ll feel the difference. Fewer fevers. No rotting smell in the air. Better living overall."

Kaedor scratched his chin. "I’ll need labor. Materials. Kilns to bake bricks. And access to mana stones—low-grade ones."

"You’ll get them," Leon confirmed. "You’ll lead the construction. Start with the central blocks first, near the well and common halls."

Elvera, who had been quiet until now, finally spoke. "You want my people to help organize it?"

"Exactly. Your dark elves have discipline. Get the people to understand how to use the new latrines once they’re built. We’ll assign rotating cleaning crews and maintenance."

She nodded. "I’ll see to it."

Leon looked over the room one last time.

"None of this is flashy. It won’t win battles. But it’s how we win the long game. We’re not just surviving anymore—we’re building a real kingdom."

The retainers exchanged glances. Even if they didn’t fully understand the problem, they trusted Leon’s judgment. That much was obvious now.

They nodded. Orders were orders. And more importantly—his orders carried weight.

Leon stood at the head of the table, arms crossed, looking down at the rough schematic he’d unrolled. Now that they understood the goal, it was time to assign roles.

"Let’s break this down properly."

He pointed at the first section of the blueprint—the main waste channel running beneath the village.

"Gorran," he said, turning to the massive minotaur. "You’ll lead the heavy labor team. I want you to pick out twenty of the strongest demons—onyx-skinned, ogre-kin, trolls, doesn’t matter. Your job is to dig out the main channels, carry stone slabs, and handle reinforcement work."

Gorran nodded. "Consider it done. I’ll have them moving earth by the end of the day."

Leon moved his finger to a section with narrower tunnels branching off into clusters.

"Kaedor," he said, eyes landing on the green-skinned goblin. "You’ll coordinate the digging teams. I want gnolls, burrowers, and earth demons under you. They’re used to tunnel work. Focus on precision—slope matters here. The waste needs to flow naturally."

Kaedor gave a sharp grin. "I’ll whip the dirt-chewers into shape. This is my kind of work."

Leon tapped a glyph etched beside a holding basin.

"Zorath," he turned to the draconic demon. "This part’s yours. We’ll be using basic purification glyphs and mana channels throughout the system. Not everyone knows how to carve stable runes that last—you do."

Zorath inclined his head, his voice deep and rumbling. "I’ll teach the technique to two or three apprentices and carve the rest myself. You’ll get proper function."

"Good." Leon looked to Elvera next.

"Elvera. You’ll be in charge of logistics and organization. Allocate labor teams per zone, make sure the work rotates, nobody collapses from exhaustion. And—most important—education. Once the latrines are built, we need people to use them properly."