Lin Fan pulled up a screen in front of him and placed it between him and Rokuko.

This was the screen for his Dungeon Master System.

Since Rokuko was the dungeon core that he was contracted to, she was naturally able to see this screen as well.

The screen wasn't on the management page, but rather it was on a special page.

This was the dungeon improvement page.

Other than increasing in grades, there were other ways to dungeon cores to improve themselves. They would spend DP to unlock new features that they could access, which was the page that Lin Fan currently had open.

After a few months of saving up and more and more people coming to the town, providing them with more DP, they were finally able to afford some dungeon improvements.

There were simple things such as upgrading the system's store or upgrading the gacha system, which would give them access to a new grade of items. Most of the items in the store were currently either at the Qi Gathering Realm or in the early Foundation Realm, these were items that Lin Fan had already outgrown.

While he would have use for them, he would also need stronger items for the stronger enemies that he would be facing.

The more complicated upgrades were things like new dungeon features.

These were things like a branch dungeon core system, which would allow creation of branch dungeon cores that would allow the creation of other dungeons. Of course, these cores wouldn't be fully developed dungeon cores and would be like clones of the main core, so they would still be controlled by Rokuko.

There was also something called the breeding system..

It was a system that would allow monsters of the dungeon to capture those that wandered into the dungeon and used them to breed more monsters. This was a system that would help reduce the cost of monsters needed to guard the dungeon.

After all, with each monster killed, there could be another monster born. There would be no need to restock the monsters that would be needed and with more "breeding material" caught, there could be exponential growth in terms of monsters.

The only problem was that there wouldn't be a way to get new monsters unless they were still summoned with DP, but there was also a work-around attached to the system.

Depending on the "breeding material" captured, there was a chance of mutations in monsters born.

It wasn't just that humans could be used as "breeding material", females of other races could also be used..

So if there was a female dragon that was used as "breeding material"...then there was a chance that the monsters created would be able to inherit dragon characteristics.

So there was actually a world of possibility when it came to this system and one could do whatever they wanted. They were only limited by the amount and type of "breeding material" that they could gather.

In a sense, this would allow the owner of this system to play mad scientists and even try to become a god.

But this wasn't something that was suited for Lin Fan's dungeon.

If he had a dungeon that focused on killing the intruders, then maybe this would be useful. But for a dungeon that focused on cooperation, if he suddenly used this system, it would mean the end of his dungeon.

After all, a peaceful dungeon suddenly turning dangerous would attract a lot of attention.

This would all be bad attention since it would draw in powerful experts that he didn't have any chance of fighting right now.

If he were to apply this system to his dungeon, it would be a disaster.

However, it wasn't as if it didn't have a use..

He decided to leave this dungeon breeding system for the future.

After all, it was certain that he would have enemies. This would be a good way to strengthen his own dungeon while taking care of his enemies as long as it was properly controlled.

The one other concern that he had was that the application of this system would make the dungeon monster want to seek out mates. If that was the case, they might even not follow his orders and leave the dungeon looking for them.

For now, he couldn't risk it.

The one that Lin Fan was actually interested in was a system called the subspace system.

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One would normally think of storage space when they thought of subspaces, but that wasn't what this was.

This was a system that was more similar to the branch core system.

It would allow them to create subspace inside of the dungeon that would be like mini dungeons. These could be used to create things like special stages for trials or death traps that wouldn't open unless the people inside were dead.

Those were the most common uses of this system, but Lin Fan had a completely different idea in mind.

The one thing that he had been worried about was how to keep Rokuko's dungeon core safe. It was possible to keep it hidden like he was doing now, but he was certain that someone would eventually have the ability to find it.

There were all kinds of people in this world with all kinds of power, so there was certainly someone with exceptional scouting abilities that would be able to find it one day.

The best way to defend against this was to create a space that no one could access without their permission. This was what Lin Fan was planning to use this subspace for.

So without any hesitation, Lin Fan unlocked the subspace function and immediately set out to create a space for Rokuko's dungeon core.

He found that it was quite easy to use this function and he was able to create a subspace around the room that she already lived in. Once that subspace was done, all he had to do was close off the entrance and not allow anyone to enter unless they had his or Rokuko's permission.

In a way, he was building her a subspace room.

Once he was done with this, he came back to the table where Rokuko had been looking over the panel that he had left open. There was a serious look that he had never seen before on her face that he couldn't help being surprised by.

After staring at her for a few seconds, he couldn't help asking, "What's wrong?"

Rokuko turned to Lin Fan and pointed at the panel before saying, "I want this."

Lin Fan was once again surprised by what she said and he slowly turned to look at what she was pointing at.

He was surprised to find that for once, it wasn't some junk food or some toy that she wanted, but rather..

She had picked out an evolution pack.

This was a pack that could be used to evolve a monster that they currently had in their dungeon, allowing it to become much stronger than before.

Lin Fan didn't even need to guess to know what she wanted it for, but..

Seeing the look on his face, Rokuko said, "He was there with me since the beginning and I won't abandon him."

Lin Fan revealed a bitter smile when he heard this, but he didn't shake his head to reject this.

He knew that she wanted to buy this evolution pack to use on Moo, the minotaur that she had summoned.

Moo had already reached a certain point where he wasn't able to get stronger anymore by normal means. The only way for him to become even stronger was to use this evolution pack and evolve past his current race to become a much stronger monster.

But that was not cost effective.

It cost more to use this evolution pack on Moo than it did to buy a new monster that was equal to a beast on the foundation realm. So it was more cost effective to just directly buy a new monster to replace Moo instead of using this evolution pack.

Of course, there was the chance that this evolution pack could evolve Moo into something that was much stronger than a Foundation Realm Spirit Beast. After all, the description said that there was 1% chance of a rare evolution, 0.1% chance of an epic evolution, a 0.01% chance of a legendary evolution, and a 0.000001% chance of a mythic evolution.

These were very slim odds that were no different than winning the lottery, so it wasn't something that Lin Fan should bet on.

Still, he knew how much Moo meant to Rokuko since it was the first epic monster that she had summoned and the one that had protected her all that time. It could even be said that Moo was like family to Rokuko and she couldn't abandon him.

So with a sigh, Lin Fan gave a nod and said, "Alright, you can buy the evolution pack."

The cost of the evolution pack wasn't that high compared to all the DP that they earned, so he could afford to at least spend this much to make her happy.

Rokuko's eyes lit up with joy and she jumped right at Lin Fan, pressing up against him as she hugged him.

She was still in that loose t-shirt, so when she jumped up, the tall peaks on her chest swung up and down, creating a mesmerizing wave that stunned Lin Fan.

Then as he stood there in a daze, he felt the soft pressure that came from his stomach.

That's right, his stomach.

Rokuko was quite a bit shorter than him, only standing at just under five feet, so her head reached his chest and her chest only reached his waist.

But even with that short stature, there was a figure that didn't match it. Her twin peaks stood tall under that loose t-shirt, creating a valley that Lin Fan couldn't see the bottom of.

As he felt that pressure from his stomach, there was something down below that couldn't help standing up.

As she pressed against him, Rokuko could feel the thing suddenly becoming long and hard, poking the bottom of her twin peaks.

She wasn't a fool, she knew exactly what this was.

However, she didn't move back as she just looked down shyly for a bit before turning up to Lin Fan with a look of anticipation. It was as if she was saying that she was ready for whatever he wanted to do to her.

There was a surging wave of heat that rushed to Lin Fan's brain and the thing down there became even harder, poking Rokuko even more.

But he held himself back in the end.

If he was going to do this, he didn't want to do it here. He didn't want to hide her away and do it here in this hidden dungeon room.

He wanted to bring her out and openly declare that she was his.

So for that, he needed a plan.