--The day to set up the fourth level of the search base finally arrived after some more days had passed.

　Should I say fortunate or ironic?

　The distance from the ground to the fourth level is much shorter than reaching the neutral city of the second level (Asropolis).

　First of all, we'll descend the 'Sundial Forest' and pass through the hidden passage between the Guild Branch and the Knight's Fortress to reach the rocky mountainous area of the first level, the 'Demon King's Castle Realm'.

　Up to this point, they are both the same, but if you want to reach Athropolis, you'll need to descend the rocky mountain range, pass through the flat wilderness, spend the night at the old Demon King's Castle, descend through the underground labyrinth to the second level, and then break through the lush underground space to reach .......

　On the other hand, the big hole that leads to the fourth level is located deep in the rocky mountainous region, and it would take only an hour to descend down the spiral passage buried in the walls of the hole, so you wouldn't need even a day to reach the fourth level.

　But the reason why the discovery of the fourth level was delayed was simply because the Great Hole was hidden by the rocky mountains and the spiral passage was buried underneath the rocks, so it would take a long time to dig it out.

　And, thanks to the efforts of the adventuring party led by Theodore, the spiral passage was fully opened, and they were able to get close enough to the bottom edge of the big hole to see the edge of the fourth level ceiling clearly.

I've heard about it, but it's really spectacular to see it with my own eyes.

　I stood on the edge of the hall near the bottom of the large hole, the current frontline base, and looked down at the fourth level from the hole in the ceiling.

　The hot wind from the hot surface of the ground was blowing up the huge vertical hole like a chimney, creating a heat like a summer day.

　Next to me was naturally Garnett, who was accompanied by Garnett, who also looked down at the large hole and let out a short voice, ''Uhee.

''As expected of a white wolf (you), if you fall from this height, you're going to fall to your death before you can [repair]. Don't let your foot or anything else slip by mistake.
'If I fall off my legs well, I can manage. The only thing left to do is fall while hanging [repair] on yourself and heal before you die.
Don't even think about the fall. It's not an auspicious occasion.

　Of course, I don't plan to head to the fourth level in that way at all.

　From here onwards, we'll be descending from a high altitude to the surface of the earth, something every adventurer has experienced at least once.

　But before that, there was something I had to do here.

Luke. Well then, let's start the pre briefing.
Oops, final checks are very important.

　Alexia called me back to the square, which was filled with building materials and other things.

　There, the adventurers participating in this mission were finishing up their last preparations for their departure.

Then, everyone. I would like to explain again the order of the operation to set up the search base.

　Alexia begins to speak proudly in front of the adventuring party.

　The content is almost the same as the explanation we received before, but in terms of ease of understanding, it seems to have improved even more than that time.

　Perhaps this is the result of making sure that even adventurers who are not very familiar with my skills and techniques can easily understand them.

　At a time like this, Alexia's background as both a craft engineer and adventurer is a great advantage.

　There must be few engineers other than Alexia who can chew up and explain their expertise in elaboration with the level of understanding of an ordinary adventurer.

At ......, here is the heat-resistant equipment developed jointly by the Beaufort family, the White Wolf Store, and the Miranda Sewing Shop.

　Alexia took out a jacket-type piece of equipment and showed it to the adventurers.

　It appears to be a thick coat with a long length and hood, but it is a substitute with an uncommon device on the outer surface and the lining.

"First of all, the main body of the coat is a gem made of dragon leather prepared by Sir Theodore. It has excellent heat resistance and won't even get burned by a little fire. It's dragon leather, of course.

　The clothes that Garnett and I always wear to the dungeon are also made of dragonskin, and I have seen firsthand how sturdy they are.

　Even if we were exposed to the scorching heat of the demonic beast Skoll, the parts made of dragonskin had no effect on us.

''However, no matter how much your clothes could withstand the high heat, it would be useless if you were to be overwhelmed by the extraordinary temperature of the fourth level. That's why this equipment contains a magic tool that cools your body temperature by releasing cold air.

　Alexia heaved the front of her coat open.

''It may look like a comfortable-looking lining, but this is a cloth that has the same mechanism as the spell scroll. By pouring magic power into it, it begins to emit cold air, a mechanism that allows it to move safely even in the high heat environment of the fourth level.

　It's a really elaborate collaboration: ...... It's a really elaborate collaboration where the dragon that Theodore killed was used to make a coat by the Beaufort family's craftsmen, and the cloth scrolls created by Noir were worked into the lining of the coat by Miranda without sacrificing comfort.

　Moreover, the fact that the scroll is made to be easily replaceable is a structure that is unlikely to be realized no matter how I make full use of my [restoration] skills.

'...... Yeah, that's right. The scroll part is disposable. But it's easy to replace it, and it can last for half a day of exploration with plenty of time to spare.

　Alexia answers questions from adventurers with ease and fluency.

　It's a behavior that shows she's been giving presentations as a technician for many years.

Of course, I am well prepared for long term exploration. This type is not disposable and can be used for several days using the magic crystals as an energy source.

　...... Gradually, though, I don't feel like the way he speaks is becoming more and more like a product sales pitch.

'But the pathway to move the magic power from the magic crystal is made of mithril, so it's ridiculously expensive. And Mithril is also metal, so it's inevitably heavy. This one will be loaned to you if you need it, so please apply to Sir Theodore for it.

　After a briefing, Alexia clapped her hands twice, making a dry sound.

'So much for the recap!　So, everyone, I'd like to thank you for your help in escorting the construction team and transporting materials!