After defeating one of the random bosses, the lowest level Cresia had risen more than thirty levels, and it was confirmed that their masters had also risen several levels.

　The miasma is a miasma that drips with miasma, so it must be a high level demon.
　It's a good idea to have a good idea of what you're looking for.
　I don't know if I will be able to defeat them this well in the next round, but well, no one, including my masters, would be proud of me in the current round, so I should be fine.

　Anyway, the level of the battle has risen in the first round, and everyone's motivation has suddenly increased.
　At this rate, we may be able to take on the demons with ease.　
"At this rate, let's keep up the good work.
　Then each of them responded, and I opened the boss room--and then I opened the boss room many times.


　After that, I opened the boss's room many times, but as expected, it was random, and the demons that appeared weren't just supermassive bats.
　A demon whose upper body is a giant demon and its lower body is a snake, a lion with wings that can fly, and a goat-headed minotaur-like demon.
　A humanoid fly that spreads miasma, a three-headed giant dog with miasma and attribute attacks, and a demon tribe that is the worst of the undead and has jet black wings, all of which appeared at random.
　Of course, there were times when the demons they fought would appear again, but by the second time, everyone was thinking about how to move against those demons, and they were able to finish the battle in even less time.

''So far, so good.''
Yeah I guess so.
No problem.
　A few hours had passed since they started leveling up, and everyone's levels had risen significantly.
　This power leveling is still effective. With that in mind, I called out to the masters, but what I got back was a raw reply.
　Then I felt that the tension between the two of them was clearly low, so I decided to ask them why.

'Aren't you two low on tension?　What's going on?
''Luciel, I'm glad to see you level up in your current situation. But hey, you can let me fight you for once.
''Our level is approaching its prime, and it's time for us to get back to our senses in the real game...''
　They're both warriors, so I understand what you're saying, but what I need to prioritize now is leveling everyone.
　I decided to take heart and prod the demands from the two of them.　

''You two had a mock battle until noon, right?　And it's not just the two of you, it's everyone else's risk that goes up.
I think it would be best if you could give Lord Doran and his men a break there.
It's a treasure trove of demons I'd like to fight at least once.
　Oh, my God, a genuine battle freak!　But if the tension between the two of them goes down, it could affect other things too........

''Hah~ I understand. Everyone's level is up there, and it's time for the Technology Development Department to return to Yenis, so I'll activate the Sanctuary Barrier on Doran and the others for the last round, and I'll watch the game.
A masterful disciple, indeed.
That trust, my squire, is a blessing in disguise.
　Things really are like that, aren't they?
　With a bitter smile on my face, I went to open the boss's room to the two of them, who had clearly recovered their tension.　
　Then a voice comes to me.

''Um, Luciel-sama, do you mind if we cover you too?
　I turned around and didn't answer Lydia's question, but shifted my gaze to my mentor.
　Because I had no intention of joining the battle this time.

''Yeah, we're not going to be overconfident either, so please.
Thank you. I look forward to working with you.
　This is how Lydia's participation in the war was decided.

In the meantime, if I'm in danger, I'll rescue you right away, okay?
I'd hate for you to do that, but if you do, I need you to do it for me.
I understand.
In that case, I'd like to join the race.
May I join you?
　In the end, Bazak and Cressia wanted to join the race as well, so the members of the team, minus me and the tech development department, were going to take on the random boss.

''Then we'll open it up,''
　After calling out to everyone, he opened the door.
　Then a highly concentrated miasma swirled out of the center of the boss's room.

''Since it looks like a powerful demon is going to occur, I will only activate the Aura Coat on everyone.
　If the miasma is exposed to such a high concentration of miasma, even the masters will gradually lose the ability to move their bodies and their physical condition will deteriorate.
　It's not a good idea to have them fight recklessly, so I decided to just assist them.

　After activating the Aura Coat on everyone, I dropped backwards as promised and activated the Sanctuary Warding near the door I came in.
　The miasma can be a very serious threat to the health and well-being of the people.　

　Not long after that, as the miasma converged, a large demon appeared.
　The one that appeared in the boss room was an undead dragon.
　It wasn't just an undead dragon, but if I was right, it was an ancient dragon's undead dragon.

''It's probably an ancient dragon undead dragon. As long as it's undead, I think it's harder and stronger to fight than the old dragon we fought in the Valley of the Dragon.''
There's quite a demon out there again.
Well, almost everyone here is a dragon slayer too, so it shouldn't be a problem.
　That's when they both looked extremely happy and ran off to the undead dragon.
''Gaaaaaah!''
　The first attack came from the yell of the undead dragon.
　Master and Lionel bent over, and seemed to manage to withstand it.

''That's a terrific yell........!
　The sanctuary wards had already been activated, so everyone thought it wouldn't be a problem, but apparently they were in a state of panic because of that yell, and they were kneeling on the ground and shaking.

　I immediately activated the recovery to Dolan and the others, and they all stood up, checking themselves to see if it had worked.
　After I confirmed that everyone had recovered, I turned my gaze back to Master and Lionel, and the two of them stood up with grim expressions on their faces and were running again towards the undead dragon.
''That's as good as it gets,''

　Apparently, those two weren't in a state of depression.
　But maybe it's because of that yell, but their movements seem to be visibly slowing down.
　I'll check my body, but from the fact that there's nothing wrong with it at all, I was beginning to think that the difference in levels might cause it to fall into a state of panic.
　Because everyone but Cressia had earned the title of dragon slayer and that was the only thing I could think of.

''If that undead dragon screams again, I'm sorry for my masters, but I'll intervene through recovery.
　It was Cressia who was surprised by my soliloquy, but also raised her voice.

''Was Luciel-sama unconcerned to hear that yell?
'It was nothing, okay?　Do you know what kind of anomaly occurred?
　...Did I say something weird?　Why do people look at me like I'm a freak?　　

'Yes. I felt my body suddenly go numb, and then I started to lose strength.
Paralysis and frailty thank you, Cressia.
　I see. I guess it just didn't work on me because my resistance level is X, thanks to Object X.
　It doesn't look like we're in any kind of crisis yet, so it's still not a good idea to let him recover on his own....


　But still, Master and Lionel managed to be fine and Bazak was shaking on his knees because he wasn't drinking Object X.
　I think I'll take this opportunity to ask everyone to drink Object X once they're done leveling.
　Probably the evil gods will attack any more abnormalities in the state, so if you are prepared, you won't have any problems.　
　I observe the masters while thinking about this.

　Both of them are unleashing attacks, but they don't have the usual sharpness, and they don't seem to be doing much damage.
　Lydia also feels that way, summoning a great spirit of fire and wrapping the undead dragon in flames.
　Following that, Cresia shoots arrows filled with magic power, and Bazak shoots countless flame spears.
　Then Master and Lionel took their distance from the undead dragon and came back to us.

''Luciel, it's probably a conditional disorder, you need to recover. At this rate, it's not decisive.''
''It's an undead that is believed to be that old dragon, but it's stronger than the two old dragons in the Valley of the Dragons.
　These two guys seem to be having a lot of fun talking even though they're in a state of abnormality.
　It's a good thing that the miasma is still intact.

The miasma is getting thicker, so do you want to activate the Purification Wave once?
''No, let's keep it that way. I didn't take a single blow, even in my weakened state.
Yes. This time I'll beat you to it.
　After receiving the recover, the two of them said that and headed towards the undead dragon again, flying slashes at it.
　From then on, the two of them attacked while making the most of their coordination with covering fire.
　With that one, they would be able to defeat it eventually.

　Just as I thought that, this time Doran came with Paula and Lisian.　　
"Luciel-sama, it seems that Paula and Lisian want to bring out the 'Luciern'..."
　Doran stated as he asked so apologetically.
　I looked at Paula and Lisian in surprise, and they both looked at me somewhat apologetically.
　I'm really pleased with this growth, because up until now they would have participated in the battle on their own accord, but now they're confirming it.
　But the problem is that Lucieln will have to intervene.
　Probably, if they participate in the battle against the undead dragons, there is a high possibility that it will be over quickly.　
　If that happens, the selfishness of the masters will again.......haha~.

''Eh, do you really want to participate that badly?''
Please... please.
Please.
　The two men looked more serious than ever.

'All right. But no large ones are allowed.''
Okay.
Yes, sir.
　Paula has just created a single three-meter-high Luciern.
"Okay, Lycian, wrap this around it.
Yes, sir.
　Dolan produces a huge, sharp stone.
　You're going to be able to get the most out of your time and money.

"Hey Dolan, what the hell is this thing attached to?
That's a claw of a light dragon.
'Kwanglong!　Then--
　Doggone it!

　Just as I was about to ask Dolan again, I saw Lucielynn leap up and deliver a powerful straight right to the undead dragon's head.
　The undead dragon's strike seemed to have an effect, as it slowly fell backwards.
　The miasma of the undead dragons is now a mere fraction of a second.
　The miasma of the undead dragons is a miasma that can't withstand the onslaught of Lucieln's attack, and the dragon's miasma dissipates in a massive explosion.

　All that was left was a huge magical stone and the indescribable expressions on the faces of my master and Lionel, but in this way, the power leveling of the technology development department was successfully completed.
　And from the next day, the days of power leveling with a mixture of the War Maiden Holy Knight Squad, Kefin, and Ketty continued, and just when I was hoping that this kind of day would continue forever, the time I had feared would finally arrive.