It's been five days since then. In those five days, I've been teaching Nathia Muay thai and Brazilian Jiu jitsu. At first I thought about teaching her one of the three martial arts that I personally made called 'Art of void', however, there is one problem.

Since I grew up in a world without mana, The three martial arts of yggdrasil is something that I made and fine-tuned to suit manaless people who are adept at using inner force.

However, since the people in this world are too exposed to mana, their body adapted to it naturally, making it harder than ever to channel a new form of energy. If forced, it might even kill the person. That's why all I could do is teach Nathia some normal arts with a little mix of methods that allows one to swiftly kill a target while slowly letting her body adapt to the inner force.

"Hah Hah Hah, t-this is harder t-than I thought, hah hah hah." Nathia who just finished having a light spar with me slumped to the ground, breathing heavily while sweating buckets.

"You rely too much on body enhancement magic that you're forgetting how to train your physical abilities. One day, if you faced someone that has the ability to nullify mana around him, you're going to die a quick death. That's why you need to strengthen your body."

"You're right... looks like I still have a long way to go." Nathia stood up and looked around the training grounds.

"Yeah, but don't worry, I'll be guiding you there so that you won't stray away from the right path..."

"Yes! thank you for your guidance! sensei!" Nathia walked towards me and tilted her head slightly to the front. I held out my right hand and gave her the headpats that she always asks for whenever she finishes her training.

"Hah, why do you like getting patted like this?" I asked as I looked at the little girl who has her eyes closed.

"I usually hate it when someone touches my hair, but... I feel strangely comfortable when it's Lucas-sama who does it. Why? a-are you perhaps f-finding it a bother?"

"No, it's just that, you remind me of someone that I also used to teach, she would also ask for headpats whenever we finish our training session." I replied to her as I felt a tinge of sadness within me.

"Eh!? you had another student? where is she?"

"Who knows? she might be at a far away place or just near me."

"Is that so..."

"Your highness." At that moment, a soldier from the sombre company, a group of people who acts at the shadows appeared beside me while genuflecting.

"How's the situation at Lemua?" I asked.

"Yes, we've been monitoring the royalties and nobilities of Lemua closely in the last 4 days. However, it seems like their preparation for the summoning ritual is about to be finished, what are your orders, your highness?"

"Refrain from interrupting the ceremony, the 42 heroes will give humanity a huge advantage against the demons in case both race goes into war. And also, inform Heize to prepare 42 vacant rooms at an inn."

"42 roo- does that mean, your highness will be taking in the heroes!?"

"Yeah, if we leave the heroes at the hands of Lemua kingdom, they will use them against fellow human countries in order to seek more power. And the nation with the highest chance of bearing their first wrath is our nation, Elune. Considering that we're still recovering from the recent war with the Jahal kingdom, we are almost at our weakest state right now, and what's the best time to attack a nation other than when it's down and resting. Elune has a rather hostile relationship with Lemua, although it's not as much as Jahal's. It's still enough reason for them to strike us first."

"B-But still, rescuing the 42 heroes from the hands of Lemua is-"

"Don't worry, I already have a plan, just relay my orders to the others."

"Understood!"

Yesterday, I asked permission from father together with the crown prince if I can mobilize around 30 people from Sombre, since father already knew that I was the one who came up with the plan against Jahal kingdom which helped us wipe out the forces from the two other nations, he trusted me when I explained to him the situation within Lemua and how I plan to attack.

Things only went this way because the nation of Lemua publicized their hero summoning in order to gain popularity and support from other nations. If they hid this information, I would've had to completely lie to father about the circumstances. In addition, father also lent us 200 knights, 3 royal knights. When Lily found out about this, she also volunteered to go with the army.

"Don't worry Lucas, Lily and I will succeed, especially with that plan of yours. Just wait for us here at the castle with Airi."

"Yes, but if things gets too dangerous, please retreat immediately." I said to them while faking my worries. If I do this, both of them would be more inclined to retreat once things goes out of hand.

The person instantly disappeared from my sight and I looked at Nathia who was quietly listening at our conversation.

"Nathia, wanna go play outside?"

"Of course, I'm ready whenever you are!"

"Good, we'll depart in 2 hours, prepare yourself, this is going to be harder than your previous test."

"Yes, even if it's harder than the previous one, I will always do my best in order to meet your expectations!"

"You don't need to worry about my expectations. The things that you do, do it for yourself. Achieving what I expect of you are just little achievements, what I look forward to seeing is your own development at your own pace and abilities. There is no need to pressure yourself."

"I-I understand, t-thank you for your kind words." she said shyly as her face turned a little bit red.

"Now then, time for preparations. Meet me tonight at the large tree near the south gate."

"Yes!"

With that, she ran back to the castle. I scanned my surroundings and detected no signs of humans within a hundred meter radius.

"Since we're basically engaging a silent war with Lemua, shall I don this attire once more?" I asked myself as I took out the Black military general uniform with golden embroideries, 3 special badges made out of diamond on the left on top of the 9 star logo and a pure golden chain at the right side from my subspace.

Whenever I go to a war with another counry all by myself, this is what I always wear in order to represent my faction and nation.

"It just doesn't feel right... going at war as a one-man army while not wearing this. I guess I just got used to it along the way."

With a quick movement, I removed my current clothing and replaced it with the military uniform changing my presence as a whole. From a person with the aura of a normal person into a complete war god.

"Now this is what I'm saying" I muttered to myself as I equipped my sword at my left side.

I picked up the communication stone from a table and contacted the other members of the sombre squad that are currently stationed at Lemua.

"Your highness, you called?"

"The operation will commence tomorrow morning, I hired two skilled people that will aid us in this war. Don't worry, those two are trustable since I know them personally. The plan is to attack the north and south side of the Kingdom, The entire sombre present there will take the south side with 100 knights, While the North side will be handled by the crown prince and Lily along with the other 100 knights. The 3 royal knights along with the two people that I hired will sneak inside the walls while the south and north are busy and in chaos, and wreak havoc in the middle of the town plaza. Since your equipments are equipped with illusion stones, we will look like soldiers from the demon continent, trying to stop the hero summoning. Remember, once the two mercenaries and 3 royal knights teleported the 42 heroes to the camp. All of you must retreat immediately."

"Understood!"

The magic stone's glow dissipated and I started to stretch my body a little and headed to the spot where Nathia and I agreed to meet.

Both of us secretly left the Elune kingdom and went to the battlefield. We finally arrived at the camp at night after 6 hours of running at high speeds while carrying Nathia at my back. Since I'm wearing a different and strange outfit along with the peaked cap that covers a part of my face, the soldiers didn't recognize my real identity, the only thing that caught their attention was my strange clothing and the silver white hair, Nathia also changed her form using illusion magic to the form she used back at Jahal kingdom.

After sleeping for more than 4 hours, dawn finally arrived and we started to execute the plan. The crown prince and Lily took the lead and ordered the entire army.

"Commence operation! All personnel. Charge."

...

A luxury car is driving down the road, inside it is Tanya talking to someone on the phone.

"Kagami, where are you now? I'm already on my way to Destinia Academy. Make sure you're not late!"

[K: Yes yes, I understand, all I have to do is show the class that you're handling some moves right and it'll be done in a flash right?]said the male voice on the other line.

"What are you saying? you'll be teaching them some light martial arts for 3 hours as their PE lesson. I promised my students that I will bring the one of the emissaries of yggdrasil to teach them personally, I can't break my promise to them as their homeroom and PE teacher."

[K: Aren't you an emissary yourself? moreover, you're the second one.]

"I don't want to reveal my identity to them if it's not necessary, the students holds an insurmountable amount of respect for Lucas-sama. If they found out the I'm one of the 4 subordinates who are closest to him, my current relationship with them might change."

[K: You really are fond of kids aren't you? Alright then, I'll be there in 30 minutes. However, after the lesson ends, I won't be staying there, I still have to watch my precious Kanari-chan's virtual concert.]

"Yes yes, do as you like, I'll be hanging up now. nu

After the call ended, the car entered the huge grounds of the Destinia academy. There are all kinds of decorations and buildings around the main school building, from a park to a mall, almost everything a student could ever want is here.

This is the only academy that Lucas founded in order to nurture future talents. All kinds of students from all over the world wants to study in this academy where your family's social status means nothing. From the highest quality goods to the state of the art facilities. This Academy that was just founded 2 years ago became the world's finest institution.

The headmaster of this academy used to be Lucas himself, but since he disappeared from Earth, the first emissary, Noele, took the position.

Right now Tanya is walking down the hallway, passing through many classrooms until she stopped in front of a certain door. Her usually stern face changed into a bright expression.

"""Ms. Tanya, Goodmorning!"""

said the entire class when she entered the room.

"Goodmorning to all of you too. Let's do the attendance." replied Tanya with a smile.

She started to call out the name lf the students one by one, and after 3 minutes, she finally called out to all of them.

"Wow, I wonder why class 1-B is on complete attendance today..." said Tanya in a teasing tone of voice.

"Of course it's complete, after all one of the 4 emissaries will be coming here in order to give us some lessons personally." said one of the female students with brown hair.

"Ms.Tanya, is it really true that Lucas-sama is already..." asked one of the male students

"Hey mike!" the male student's seatmate tried to stop him from asking but Tanya answered the question anyways.

"It's really unfortunate but... the rumors you heard.. are true."

When the class heard her confirmation, they all fell into silent. They already expected this answer, but when they still received confirmation, they were still devastated, most of them even started to cry. After all, majority of the students in Class 1-B are former victims of human trafficking that Lucas rescued.

"Now now, don't be too sad, His majesty won't like it if you guys started crying like this." Right now, seeing all the students in this situation, Tanya held back her urge to grieve, she still forced a plain smile on her face while urging the students to stop. In the end, she managed to calm them down.

The door opened and a man with black hair and lime green eyes entered while wearing military clothings.

"Everyone, look. This person is the 4th emissary of Yggdrasil, Sky king, Kagami. He will be teaching you some martial arts for the day, make sure to listen to him." said Tanya as he introduced the person who just arrived.

Although there are still hints of sadness in their eyes, the students stood up excitedly and greeted their temporary instructor.

"""Greetings to you, Mr. Kagami!"""

"Goodmor-"

But before kagami could greet them back. He noticed an unusual change in his surroundings which is also picked up by Tanya.

A huge green magic circle appeared all over the room and sent the students in panic.

"Kaga-"

Tanya's voice got cut off when all of them disappeared from the classroom.

...

When Tanya and Kagami opened their eyes. They saw that they were already in a different location. Surrounded by knights in full plate and a certain person sitting at a seat that looks like a throne. Both of them instantly became wary of their surroundings, since they're not sure what the goals of the other party are, they refrained from making unnecessary actions.

All the 40 students woke up shortly after and they were also confused by what just happened.

"Where are we?" Tanya asked the person who is sitting on the throne.

"Welcome, Heroes from another worl-"

"Cut off the bullshit about us being heroes who got summoned from another world in order to save your sorry asses from the demon lord. Answer our question, where are we exactly and who are you people!?" said kagami in a cold tone of voice as he let out his murderous intent at the unknown people.

The king and his knights started trembling when they felt the intense bloodlust, but instead of submitting to fear, excitement overcame them.

"S-So this is the power of a hero, this is amazing! Please calm down Hero, we have no intentions of harming all of you, please hear me out first will you?" the king requested.

"Calm down kagami, for now, it looks like he's telling the truth, let's listen to him first. And you children, keep close to me, I won't be able to protect all of you if you're scattered"

""Y-Yes, Ms. tanya"" replied the students.

"Thank you for your kind consideration, Miss. Now then, let me explain things to all of you." said one of the people who is standing beside the king.

He explained everything to them about being heroes who will defeat the 4 remaining Demon lords. When Tanya heard this, her body started shaking from anger.

"Magic? Heroes? Demons? Do you expect us to fucking believe this!? are all of you out of your minds!?"

"How dare you insult the king!" shouted one of the knights in black platemail as he tried to strike Tanya with his sword. However, she easily caught his weapon and broke it using just one hand."

"""Whoaa, I didn't know Ms. Tanya was this strong!""" said the students when they saw what just happened.

All the knights in the large hall entered their battle stance.

Suddenly, the large door behind Tanya and the others slammed open and a knight came running in.

"Report! 100 middle ranked demons with a high ranked demon as their leader are attacking the North and South side! Your majesty, what are your orders!?"said the wounded knight who came in running.

"What? Demons? Hahahaha, they must be here to try to stop us from summoning the Heroes, but too bad, we've already succeeded. Now, Heroes from another world, look at how these savage demons try to destroy a country of innocent humans. As their King I would like to humbly request all of you to subjugate them, please lend us your strength."

After saying that, A knight came flying in from the outside, the knight's dead body almost hit the king, but a guard successfully stopped it midair using magic.

When Tanya and the others saw this, they were shocked. Up until now, they believed that they were just being fooled by these people, but now, they have no choice but to believe their words.

"Hmm? those uniforms... aren't those the uniforms of the students from my Destinia Academy?" At that moment, Tanya and the others heard a familiar voice coming from behind the cloud of dust.

"That voice!"

Finally, when the dust subsided, they saw the familiar tall figure of a man with white hair, wearing a black military uniform while exuding a majestic aura.

"Don't you think the students' field trip location is a little bit too far this time... Tanya?"