Landing on their feet, their legs partially bent, they blinked seeing the interior.

"Whoa!" Nemu exclaimed obnoxiously seeing the insides of what appeared to be an underground City. The glowing water, the sparkling ceiling and the ma.s.sive pillar on the Northern side of the place.

"Is that some kind of castle?" Enri pointed towards the Pillar as Jack emerged behind them, his hands folded behind his back. Her eyes narrowed on him, her big round eyes taking him in.

"So it seems," Jack replied sarcastically with a smug look on his face as he looked her over. She had eyes of wonder, surprise and awe. All of this had been 'hidden' underground for hundreds of years according to the story he shared.

If they had studied the ruins from the Greed Kings, they'd be able to conclude it was from around that era, of course these villagers likely did not possess such knowledge.

"Jack!" Nemu immediately tackled his leg, wrapping her arms around it as she stared up at him. Pressing herself into his leg as to get his attention.

Jack glanced down at her with a brow raised. Part of him wanted to punt her off his leg, but at the same time he wanted to pick her up and smother her in his arms. She was absolutely adorable. "Hm?"

"Can we go to the castle? Can we? Can we?" She leaned back slightly, her hands now just grabbing at his pant leg, jumping up and down.

"Nemu!" Enri scowled.

"It's fine," Jack said as he narrowed his eyes on Enri for a moment, then looked back down towards the girl with her fingers curled into his pants. "Want to ride on my shoulders?"

"Pfff.." She immediately let go of his leg, "I'm too old for that," she placed her hands on her hips looking up at the much taller dragon man.

"Suit yourself," glancing over towards Enri, he held out his hand for it to be held. "Take my hand."

It wasn't a question, it was an order. Not that it would've made her choose not to if it was a choice to begin with. Enri reached her hand out slowly and grasped his open hand, letting his fingers curl around her hand. Unsurprisingly, his hand was warm, even through the gloves he wore.

His eyes then flickered down to Nemu who was smiling up at him, holding out her own hand for him to take. Rolling his eyes though, he took her hand with a light squeeze, causing her to wince.

"Onward then," Jack smirked as they began to make their way into the underground city. As they entered the commercial looking district, there were people standing around by the storefronts.

They were in armor and uniforms, dresses and other elaborate attire. Most of the ones present outside were members of the Honor Guard. Some of the maids were cleaning the streets, while some of the buildings were being refurnished.

"This is amazing!" Nemu was looking from left to right, Jack's arm acting like a leash as she moved around him. Though he was careful not toe trip or walk into her when she got in the way.

Enri smiled down at her little sister, and somewhat felt sorry for Jack as he had to deal with her supposed misbehavior. However as she watched him, smile, watching her she couldn't help but smile herself. He seemed in some capacity to enjoy himself from what she could see.

Though she was curious, this place did give a feeling of once being lived in, even with the renovations. However she wasn't seeing any children present. Why wasn't there any children? This place had been underground for hundreds of years. All she was seeing was young teens and adults.

That and plenty of nonhumans such as the insect Daniki, who was patrolling the street with a handful of armed guards, and Lannec who was jumping from rooftop to rooftop in his Lycan form.

"Werewolves and even giant insects..." Enri thought that the Hamster was a monster in the sense of its size and power. Part of her even thought that Jack himself was a monster in human form, in which he technically was. This just put the icing on the cake.

"We have a cyclops here, and quite a few other species. Even a half-golem."

"...Half-Golem?" Nemu blatantly asked as she looked up at Jack, bringing herself back to his side.

"A magical construct, an intelligent Golem, capable of intelligent thought and cannot be controlled by anyone else other than itself.." Jack explained how the Golem was different from the others, though Golems were rare in this world, as it not only took years to make but also a lot of human resources.

"Mm… Sounds weird," Nemu shrugged as she spoke in a blatant manner before narrowing her eyes on a skeleton who was walking along the opposite side of the street they were following.

Both Enri and Nemu stared at him, their jaws nearly falling off. Yet Doodle paid them very little mind.

"Was that an Elder Lich?!" Enri suddenly blurted out, peering over her shoulder after the Undead.

"Overlord, actually… Highest ranking undead related to the Elder Lich. Two of them live here." Jack retorted with a mirthful simper at their reaction to the presence of the undead.

"They're not going to experiment on us right!?" Nemu immediately looked up to Jack, afraid.

"No, they're not going to experiment on you… Probably not." Jack teasingly glanced away slightly as she felt her squeeze his hand as hard as she could.

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"Noooo..." She whined.

Enri giggled softly seeing the smirk on Jack's lips. "He's just kidding Nemu, he's not going to let them do that… Are you Jack?' She squinted her eyes lightly at him.

"I won't let them," he made a toothy grin as he lead them towards the center of the city, entering what appeared to be the residential zone. Homes and apartment looking complexes could be seen here.

"We have enough room here in the underground to move the residents of the village underground should there ever be a need." Jack stated as he gestured towards the housing. "There is also an unlimited source of water over there," he pointed towards the glowing body of water.

"Unlimited…?" Enri blinked several times, this meant that they would never suffer from another drought, and other villages may end up depending on them for water.

"We could also expand the existing sewage system to the Village," his eyes narrowed on her, "If given permission." He wasn't really asking, again, he was going to do it whether or not they said yes or no.

He was going to use all the modern knowledge he had from the trivia his last world gave him, which he seemed to have no problem remembering in this New World.

"O-of course.." Enri's smile became faint as she looked to him and then down to Nemu who was admiring pretty much everything. She was still like a little riled pup on a leash. Though she was pretty sure she was futilely pulling on Jack's arm, just because she could.

"Well, when we first entered. That was the commercial district and as I said before, this is the residential." He then pointed off in the distance towards where the production plant was towering over many other smaller buildings. "That is the industrial area. Once it's been activated, I'll show you its first products."

Nemu pursed her lips looking towards the building, "How many people work in there…?"

"Only needs a few people to maintain it, the machinery inside tends to do most of the work."

"How does the machinery work?" Enri asked curiously, her eyes trailing towards the glow of the water again. This place was a mystery to her. Its architecture was nothing like she had ever seen.

She was beginning to wonder if Nphirea was going to like a place like this. Her head lulled to the side slightly, not really sure why she was suddenly thinking about the awkwardly friendly potion maker from E-Rantel.

"Ambient mana reserves, most likely," Jack pursed his lips not really sure how it works, as he himself hadn't inspected it. However his people had said it could be operational whenever he desired.

"I see..." Enri creased a brow before looking towards the castle.

"Time for the castle then," Jack snickered quietly as he lead them towards the bridge leading to the other side of the City across the body of water.

Nemu glanced off the side of the bridge and towards the water, her mouth gaping open at the sight below. There were no fish, but there was plenty of water. It was so clean and clear, she couldn't even see the bottom.

"Why isn't there any fish?"

Jack came to a slow stop before glancing down into the water, "Hm… There's a mermaid who lives in the castle that occasionally inhabits the lake."

"Mermaid!?" The girl looked up at him with these starry eyes, "really?!"

"Yes..." Closed his eyes partially while looking down at her before continuing to walk along the bridge and over to the other side.

"This is the uh.. n.o.ble and Financial District," Jack gestured towards the larger buildings leading towards the castle. He didn't really take his time, as he lead them up the stairs onto the plaza. "This would be the plaza, where people could set up markets if they wanted..." He looked around seeing pretty much no one except for Guards in the plaza and no stalls set up for aesthetics.

"This is the front gate," Jack pointed towards the ma.s.sive main gate of the castle which began to lift up, revealing the courtyard leading to yet another ma.s.sive door which was beginning to raise similarly.

Nemu jumped slightly in front of Jack, trying to make him move faster as she wanted to see the inside of the Castle. What she was imagining was a bit more of a normal interior. However the inside was much larger than the exterior.

The fact that there were very few real windows made that rather apparent at first, if one was really paying attention.

Entering through the grand hall which began to fade to dark the further they ventured. Soon they would find themselves in what appeared to look like a ma.s.sive giant greenhouse with multiple 'floors' of various plants and vegetation that catered to different biomes.

YGGDRASIL Golden Apples were on the first floor in the orchard area, along with various other fruit trees. However on the second level of the first floor, the entire level was used for the synthetic environment of the Platinum++ Asgard Pekoe Tea Leafs.

The five levels were fragrant and almost heavenly.

However if one was to pay attention, one would be able to see another Overlord within the plants. Watching them. It was Teetle, controlling the vines which were subtly moving about the first floor.

"Jack-sama, I see you have guests," the Skeleton laughed softly as it would the reveal itself.

Jumping lightly, Nemu almost pulled her hand out of Jack's grasp, only to shrink by his side seeing another undead that looked a lot like the other one.

"This is Teetle, one of my trusted Floor Guardians," his eyes rested on the top of Nemu's head with a curious look. "Perhaps you'd like to take a tour with him?"

Nemu blinked and looked up at him, not really understanding his intent. "I thought..."

"Oh don't worry," the Lich sn.i.g.g.e.red, "I won't experiment on you. If anything..." The Lich would reach into his sleeve and pull out what appeared to be candy corn. "How about trying some candy?"

"Candy?!" Nemu's eyes immediately lit up and she voluntarily released Jack's hand. If he was to be trusted by Jack, she cold trust him. That is what allowed her to have the courage to take the bait.

Teetle then looked over towards Jack, "We have another guest from the Slane Theocracy in the prison, when you're done with Enri-san."

Enri immediately looked to the Overlord with wide eyes. A prisoner from the people who had attacked them? Since when did this happen? She thought everyone had been killed off in that attack! Her fingers curled into Jack's hand slightly.

"The person who was watching the back from the safety of their homeland."

Enri tensed up even more, considering the fact that they had nabbed someone from a nation infamous for its magical abilities. It was unlikely that they'd be able to avoid getting into a fight…

Was that the reason he wanted to build the wall? Enri looked the side of Jack's face as he was nodding to Teetle who lead her little sister off on a tour of the castle.

"So… Why are you separating us anyway?"

Jack looked to her as the other two vanished heading to the next level to see the other plants. "We're going to go to the throne room to talk with Silva."

"The Vampire? Why…?"

"She is the Head Guardian, who will help coordinate the construction of the wall." He explained as he lightly twirled her with her arm above her head, before pulling her close. "Then we'll have some fun?"

Suddenly being twirled around by him, her face lit up as she brought her in close. "Fuh-fun…?"

Jack couldn't help but give a suppressed laugh before using the Guild ring on his finger to teleport directly to the Throne Room. Appearing only a few meters away from the throne.

"Jack-sama!" Silva who was standing beside the throne announced his arrival, with wide eyes. "Welcome home," she stood at attention with her hands behind her back.

"Thank you..."