I Returned In The Past But Why It Look Different?! (Multiverse Fanfic)

Chapter 10

"...By Satan Leviathan?" Rias asked, she had a very bad feeling about this…

"Yes by Lady Leviathan herself! Do you know how embarrassing this is?" Lady Gremory walked over and dropped a file on Rias table, before taking her seat.

"Read this! This is the summary of what you did in the past 9 weeks as Overseer of Kuoh!" 

That moment Rias realised that she might be in a problem. She didn't need to read this she could simply see that she was in a deep mess just by looking at her mother facial expression.

So, without wasting time she opened the file and started reading it…

…

…

…

A few minutes later she put it back and realised that... yes, she was in a very big mess…

"You want this to end up in devil council? You are an overseer of Kuoh city. Worse of all you are under a contract, the very same contract Lady Leviathan is. She was scolded by Marcus Goldman for trusting you to test the Diamond Core Heart abilities."

"B-B-But mother...I did…"

"You were only spying on people! You never tested the magic reader. You never tested the other capacities of it! He even was interested in how you going to train for your inevitable Rating Game against Riser Phenex.

You were contracted to do it! He even left secrets for you to figure out! Sona already figured out half of the capacities on her own!" 

Rias looked down not daring to meet her mother's eyes.

"To make it worse this revealed that you were doing nothing in that period. Neither you were studying to be Heiress of Gremory house nor you were training your Peerage in any way.

It even stated that your greatest achievement in this period was doing human homework!" Venelana finished her rant as she was staring daggers at her daughter.

Worse of all. For the brown-haired devil lady that she scolded herself by Marcus. And it was humiliating for a person who is much much older and receiving a scolding from a 15-year-old. She doesn't want this to happen again... period!

"Lady Leviathan position Sona and you for perfect opportunity to be close to one in millennia genius inventor. To test his tools and inventions! He could have helped you with making pseudo-Sacred Gears against Riser Phenix! He already has those according to Lady Leviathan!"

Rias eyes widened so did the rest of the girl's peerage who were forced to listen to Lady Gremory rant.

"Well?"

"...I…"

"This is what is going to happen from now on. If I receive another complaint from Serafall Leviathan again about this. You will be returning to Underworld permanently. Until your marriage to Riser Phenix… since you don't care about this at all it would seem." 

"I CARE!" Rias snapped out when Venelana mentioned Riser Phenex.

"No, you don't. Past 9 weeks alone you didn't even use your demonic energy at all. You didn't practise Power of Destruction. You didn't practise teamwork with your peerage. Sona does weakly teamwork training. Weekly magic training. Weakly tactics training.

This is your last chance daughter. Mess it up again. And next time it won't going to be me who will be scolding you but Lady Leviathan. She mentioned something about sticking out her neck for you. You don't want her to be angry at you." Lady Gremory finished this time for real as she got up from the couch.

"I hope next time we will have a more happy meeting than this. I will see you later." With a flash of red, she disappeared from the room.

The moment her mother was gone Rias collapsed into her chair. She looked like her soul has been sucked out.

This didn't last for long as she quickly opened one of the drawers and pulled out a contract, she started rapidly reading through it properly this time. Going page by page.

Then she groaned loudly after finishing it.

"Rias?" Her Queen asked with some concern.

"The contract… it's not a regular one! I thought its regular summoning and doing it and then being done with! But, this one is long term one when you have to follow the contractor for over several years!" The Red-haired devil heiress exclaimed loudly as she realised that she was being dumb.

It doesn't just last for 2 weeks when Marcus was here. But it last as long as he was decided to reveal himself at large.

Thankfully she didn't tell anyone what kind of technology he has developed… otherwise, she would be packing her things by this point and going back to Underworld.

While she was on edge by this point she still can get it back into the game!

"...I thought you read through it properly before signing it! That's the basics among basics in devil society!" Her Queen exclaimed loudly she can't believe her King slipped at basics like that! Especially on such an important contract!

"Like you could read this properly when Leviathan is breathing at your back! You could not imagine how Sona's older sister was serious!" Rias said that with a flustered look.

Akeno rolled her eyes and sighed with a resigned tone.

"Of course she was serious it's important to whole Devil Race. And you just showed to important contractor how lazy devils can be." The black-haired Queen said with a resigned tone.

"M-Maybe so! But he didn't cancel the contract! We can still fix it!" Rias pumped up herself. Still, there was some sweat on her forehead.

"I hope so, just don't… provoke Lady Leviathan more… I doubt even Lucifer can save you from her wrath. Especially when it's related to this contract she so seriously safeguarding."

Rias nodded at her Queen words. If from what she saw between Serafall and Marcus she knows that something deeper is going on between those two. Especially for Leviathan to contact her mother like that.

Meaning that the Leviathan is probably infuriated with the fellow teen. And the redhead is not going to lie he is eye candy. 

Pity that Marcus found her in a very awkward situation probably dropping his opinion about the Gremory Heiress considerably.

Nonetheless, she still has one chance. Well, it's not a chance by this point as alot of hanging on this. So, she can't be lazy anymore…

"I won't. I didn't realise that I was still contracted to him… this means we need to draft a training schedule for everyone and start training…" Rias said that as she had thoughtful look.

Her Queen nodded, she was happy in a way that they can start training and her King can stop with that silly idea of playing human school girl especially when her marriage with that Phenex is so close.

~~~

After giving Rias piece of her mind Venelana returned to Marcus garage. Now she needs to rebuild trust with her Master.

Especially since she doesn't want that Phenex brat for son-in-law, as well as she doesn't want to force her daughter to marry. Since Venelana knows quite well that Rias wants to choose who she wants to marry.

Then… the brown-haired devil lady mind derailed…. When she saw her Master sitting lazy on the couch with his tabled in hand assuming he is going through some details with his new invention.

But, what truly makes her brain stop. Is that her son's Queen was sitting on his lap. With quite a flushed expression. The silver-haired maid was feeding him very...seductively…

It doesn't take a genius to understand what is going on with the Lucifuge.

"G-Grayfia… y-you… when did you…" Nonetheless, this discovery pulled the earth underneath her feet…

Underworlds two most powerful females serve the same man… this is quite bad…

"Oh… Lady Gremory… I am quite busy at the moment…Master requested me to feed him." Grayfia only looked at Venelana for a bit before returning to feeding Marcus.

This looked quite similar to how lovers are behaving on a date…

Not even her son was able to make this woman behave like this.

'I won't be able to get anything from him like this… do I truly need to take the next step if I wish for him to help Rias with her arranged marriage issue?' Internally Venelana frowned realising that she won't be getting anything when both Serafall and Grayfia by this point are probably getting railed quite often by him.

Before long Serafall herself returned with a bored look on her face. Assuming she had to attend another boring meeting with the council.

Then her eyes widened seeing Grayfia taking 'her' place.

"GAH! Grayfia!!! You...when did your relationship with Master develop to the point that you sitting on his lap!?" The current Leviathan said with disbelief and some jealousy in her eyes.

"The moment he used his modified Ars Goetia I had urge to serve him. For some time I resisted this urge. But, eventually, it was too much for me I decided to serve him to my best capacities.

And I am the one who steps in when you are not around." The silver-haired maid said with a matter of fact tone. Sounding like what she is doing is utterly important.

"I see… so… whole Lucifuge serving Lucifer thing transformed into this?" Serafall is trying to understand how much this has affected Grayfia and how much threat the maid is to her.

"She has massive servitude fetish, the Ars Goetia turned into power somehow. Even Aurora can't figure it out. I have run several emulations on this. The only thing which makes sense to me is that she wants this herself." Marcus said from the side his eyes never left the tablet's screen.

"Master~~~ this embarrassing! You can't just say that out loud!" The maid said with an angry pout. Making both devil ladies see the new face of the silver-haired maid.

Both Serafall and Venelana looked at each other with disbelief. This is the ice-cold maid they used to see?

"I am only stating the truth. And return to your duties." He said sharply making the maid tingle…

'Oh… she has turned into Masochist? No...or maybe? It linked with her desire to serve so if her master is not satisfied she will try harder…' Serafall thought to herself. She is realised that Grayfia may even be a bigger threat than she thought.

But, then again Grayfia is a maid. And Serafall can always take a different position to be close to her Master…

'I need to think more on this…' 

While the Leviathan is thinking about her future. Venelana is already thinking about getting his help to solve Rias marriage. At the moment Marcus is the best candidate for that. He is not related to them in any way and he can support her daughter with gears and other things.

But, as it is. Rias herself has messed her chances. Meaning that she might need to take drastic measures.

'Let's wait and see for now. Rias might get herself together and I won't need to do this…' The brown-haired devil lady thought with a frown before hiding her frown behind her casual smile.

Now that Marcus has two devil ladies which constantly wants his attention she wasn't forced to show her real feelings like that.

So, a light mask is easily can be placed… well… as long as she doesn't get too much of Marcus attention as her Master is meticulous that way. One needs to be like that when is surrounded by experienced devils.

Over the past months, she heard multiple times how Serafall tried ro recruit him to become Serafall's Queen. But no matter how much the Leviathan seduced and by all means fucked her Master would always joke about it. 

Meaning that he always sees devils in some way lower species. Well at least subconsciously. Thus always denying in any way to become a Reincarnated Devil.

'Well, let's sit back and wait. I still have around 3 years until Rias needs to marry that brat.' Venelana sighed internally thinking about her lazy daughter. She has such a good core of peerage members. Sirzechs worked hard in placing her right place for each of them. Yet, she wastes away their potential with her nonsense. Hopefully, she grows up... otherwise…

~~~~~~Later~~~~~~

"Is that song…" Serafall appeared in Marcus workshop after a day of nonsense in her workplace. 

The first thing she hears is music. This was the first time she hears that. But, then again this was no surprise that her Master started doing that as with each day he was getting closer to finishing the scale mail.

"Meteor… Gundam Freedom theme song." Marcus said as he was partially dressed in the armour. He had booth feet and arms suited up in the dark grey pieces of armour.

Serafall nodded before walking forward and inspecting the chest piece armour safely placed on a specially prepared mannequin.

Just like before she saw a mere drawing become reality now she saw something from an actual anime become real… then going through refitting so that the armour could work in real life.

It was a fascinating experience. Now Serafall is quite interested if her Master could make true Magic girl stuff? While she can imitate the effects to a certain level she wants the real deal…

That's why she wants him to ask her to cosplay as a magic girl so that she could bring up such an idea! Well, she can only wait for the right moment.

"So, what are the specs of it?" She asked curiously as the black-haired devil inspected from different angles. This was no longer robotic-ish but more human armour-ish. Not as pointy and square-ish as the original design but more fitted to be wielded as a suit of armour.

"Specs… well it's not combat orientated. This is the prototype. All other scale mails will come from it. Still, if I could place it somewhere…

Taking into consideration that it's powered by perpetual energy, the armour is constantly getting powered with it. The metal itself is as strong as the energy flowing through it. The energy wings allow the user to fly at speeds five times faster than the sound. And that's the limit because of the G-Force cushioning inside of the armour.

I guess that the armour could easily tank and keep up with an ultimate class being. That's without assistance from the person inside of it. I haven't tested the limits of my reinforcement magic while in the suit." He explained casually with crossed arms.

"And that is not combat orientated?" She asked with a baffled look.

"No. There is no spec of combat orientated systems inside of it. So, it's not combat orientated." Marcus said with shrug.

"But M.T.M alone could technically fight me! If you can make it sturdier it could face a Super Devil! Since the energy is infinite!" She reasoned with him.

"True. M.T.M was created with Castor & Pollux but it never was created as a weapon. It was created as an energy source to power the other system. Once the suit is done I will focus on the real weapons to be wielded by the scale mail." He said with a smile. As if the current mark IV Castor & Pollux is not real weapons…

"Real weapons?" She asked with some trepidation. This was truly getting out of hand. Well, all she could do at this point is mitigate the damage which could end up directed towards her race.

"Since the scale mail is based on Freedom it needs its rifles." He said excited tone.

Serafall could only nod at him. She wonders what people behind the anime would think that they inspired the creation of real weapons capable of slaying deities by this point. 

~~~~~~Marcus~~~~~~

Around 8 months into building the armour It was ready. As expected the hardest part is and always will be the prototype. From there out, it should be quite easier since one starts gathering the data.

It was much easier with Aurora's help the A.I behind my OS was assisting in the creation of the Scale Mail considerably. Cutting months and even years of work away with its calculation.

From adjusting the designs to real-life to the grunt work of assembling the pieces.

All that is left is to start collecting the data with fieldwork to make the armour better.

For this, all of the devil ladies decided to check it out. The first proper suit up and flight.

It is either from boredom or they wanted to see this in action it doesn't truly matter. All I cared about is flying with the power I created myself.

"So this is it? Your answer to the scale mail?" Venelana asked as she walked around the armour curiously. She was looking at it from all different angles. 

"It is… while not spaceworthy or deep water. It is possible to fly to the arctic with it." I said while putting on skin-tight gloves. For this, I made a special suit which will absorb some extra G-Force. As well as assisting in vital readings. 

My words made her quite baffled. She decided not to comment on the whole space and deepwater exploration.

As if I will be satisfied with only exploring the regular places…

"I see… I guess… we have different types of perspectives on things…"

"You think? You are the first Master's summon and you still don't understand his perspective?" Serafall said with an eye roll before looking back at me.

"Master we shall follow your progress from the workshop. Let's see how good it is. Worst case we shall teleport to your location." The current Leviathan reminded me about the countermeasures in the worst case. This is impossible to happen unless a super Devil class is pop-up or a meteorite smashed into me. 

Nonetheless, Serafall is always ready to earn her brownie points.

I nodded at her before approaching the platform. Seconds later two pairs of boots came out from the ground.

With two easy steps the boots got locked in then I spread my arms and the mechanical arms started putting the armour piece by piece on my body.

Did I copy Iron Man with this? Most likely yes. This step came naturally as the future models will be something closer to Nanotechnology.

But at this moment I need it to be set up the same way Iron man first models do.

Once all the body parts are done with the last one being the helmet. My vision turned completely black before. The H.U.D kicked in.

[Aurora OS boot up]

[Boot Complete]

[OS Start-Up in process…]

[Aurora H.U.D online]

[Exoskeleton System online]

[G-Force support online]

[Diamond Triangle Core Stable]

[C.E.F.S on online and on standby]

[S.N.M.S.S on online and on standby]

[Synchroning Systems…]

[Synchronisation Complete!]

[Freedom Scale Mail MK I is ready and Standby!]

I looked around the holographic display followed me. The thought-reading runes are working perfectly and reading my thoughts just like I wanted them. 

This is the first time I am using more than two pieces of the scale mail.

Looking at the HUD it shows that all pieces of armour and green and ready for use. The Diamond Triangle Core is supplying with unlimited amount of energy. By this, I am only looking at the readings if the flow is good enough instead of thinking that I will run out of juice.

After doing a simple manual check I walked forward, the ceiling started lowering itself, I could see the driveway leading out of the garage.

Getting outside properly I looked around. It was just past midnight. Best time to test this. Still through the suit is very visible as it is. That's why Aurora is in the background to make sure no photos or videos are leaked to the internet.

Not that I care that much about it, nonetheless, if someone sees me they will have a hard time uploading it to the internet.

Taking a deep breath I finally spoke the magical words.

"Deploy energy wings." 

[Deploying C.E.F.S]

A pair of wing frames came out of my back moments later pure white energy wings ignited from them.

In the middle of my vision, the horizontal line appeared, the flight assistance was on.

Then…

I thought of flying…

Before I realised my body was already rushing up with neck-breaking speed. 

My eyes went wide, I knew that this will happen. But, the speed was insane! The numbers and real experience are two different things!

Before I knew it I was already high in the air and approaching the red zone. The void of space.

Quickly stopping the ascent I took a deep breath, the suit was far too… sensitive. Still, though it stopped the moment I wanted to stop the energy wings were just that good.

Looking around I saw the night sky with no cloud in sight since the clouds were below me. I was able to see the crescent of the moon, and the void of space, the curve of the planet... The night vision was operating far better than I expected.

Taking in the sights for a few moments, looking down and seeing my birth city it was extremely small. Looking south-east I was able to see the capital which was slightly better-looking size-wise since the night lights give one sense of size the city is better than daytime.

After having my share of sightseeing I decided that it was time for the flying tests and training…

"Set course for the Baltic sea and switch the flight assistance to adjust according to my learning." 

[Destination is set. Adjusting the Flight Support system]

The holographic display highlighted where to fly. Without wasting my time I leaned forward and started to fly in that direction, this time I was the one flying and not the autopilot. Thought the difference is quite small in those two.

It assist when I start messing up. Nonetheless, it only was needed for a short time as I was starting to get the hang of this type of flying before long my speed accelerated.

Since there are no obstructions in the sight I was able to break the sound barrier and stop holding back.

Weirdly enough the flight was quite short. The distance of over 250 kilometres was crossed in an extremely short span. As someone who is used to driving a car instead of flying.

I remembered quite well that I used to spend the majority of the day travelling from my home to the seaside… and now I crossed that whole distance in record time… less than twenty minutes. 

In the time I needed to get hang of the flying I already crossed the majority of my birth country…

[You have arrived at the Baltic Sea coast] 

Looking down I saw the sea. My HUD scanned for any ships in the area. 

"Try to find out if there are any ships in the area, if there is any build up a route… all the way to Denmark. the amount of distance should be enough to test out the flight system."

[Understood. Accessing the GPS satellites in the area…]

[Building navigation route…]

Portion of my vision transformed into the map of the Baltic Sea, all the ships in the area have been marked and the route around them has been established.

[The route has been created. There is a total of 947 kilometres of sea to cross until Denmark's national waters are reached.]

I nodded internally. This sounds about right. Not wasting any more time rushed forward this time not restraining myself at all and easily reaching the speed of Match 2. Then climbing into Match 3. 

This was where I started to feel that manoeuvrability drastically dropped and even the slightest amount of movement can affect my speed. It would seem the Energy Wings can't magically overcome the basics of the world's physics…

This means only one thing… finding a magical way to fix this issue.

'Perhaps gravity manipulation? A bubble of negated gravity? Hmm, let's type this down.' I mentally opened the notes window and entered it there before continuing with the flying.

Testing out the maximum allowed speed before the G-Force starts affecting me. Not that magic channelling helps here much. It would seem I either need to have more Magic in general or my body needs an upgrade.

Typing that down once again, I continued to test the scale mail capacity, as well as the versatility of the energy wings. To say that they are amazing was an understatement. The amount of physics breaking they can do is simply astounding. It's like they are gliding...cutting through the air. Doing some impossible V turns was not impossible. Of even zigzag rapidly. The only downside to this was in the end the human element.

Even the reinforcement didnt help me here with processing of the rapid changing directions. This means…

I need some mind magic. Some sort of thought accelerator or mind partition. These would help me in overall day to day tinkering.

Once again I typed that down.

And so before I realised I was already in Denmark. It took me around an hour to cross nearly 1000 kilometres. Quite impressive and it's only a prototype.

"Time to return. And check out the data."

~~~

"Flight test number one: The scale mail thought readers are quite sensitive and some diagnostics should be run to modify them. Perhaps some extra factors should be included when the thoughts are read.

While the energy wings do break some of the physics of the world they still fall into some of the rules of the world. A possible solution to improve the speed without adding G-Force is gravity manipulation. 

This requires some testing before adding this as the possibility to improve the armour.

Next, is the limits of the human body. Freedom could fly even faster than recommended limits of Match 5. But the human limits got in the way. First is the reaction speed of a human and secondary is the body itself could not handle even with all the support from magic and the technology stored in the armour.

Possible solutions is mind magic, genetics to improve body, and specific spells to improve the G-Force resistance or even negation of it altogether."

I opened my eyes after telling the whole monologue. My dizzy vision went over to the computer screen. I saw the whole of it being recorded. Thankfully, somehow I was able to make the OS pick up that I want to record. This means that the Aurora is learning quite nicely.

Nonetheless, it was time to rest now that the test run was over. I guess I didn't add the whole jet lag into consideration now that I was back from the flight and I am feeling like shit.

"Slowly getting up from my chair and walking over to the couch falling into it face first, the moment I felt the soft pillow I passed out.

~~~

Once Marcus was out the three devil ladies just looked at him. Two of them just sighed. Serafall was impressed just as much as annoyed how her Master didn't ask for help with the whole aftermath of the test. He still keeps them at arm's length. Not fully trusting.

The same was with the Silver-haired maid. Who already sees him as her only true master. 

Only Venelana was the most baffled seeing the whole Scale Mail in action. She watched the whole test run. Unlike previous times which she missed the guns and the Diamond Core Heart. This time she saw it properly and was astounded by the capacities of this.

If Marcus is to mass produce these he could simply rule the world! These armours don't need the magic of the user! Unlike the Scale Mails of Boosted Gear or Divine Dividing users who needs an extensive amount of training to achieve their armours her Master can just put it on and he will be a being close to an Ultimate Class!

It was simply absurd! 

'No wonder both of them doing whatever they can to get his affection! No matter what he does it becomes a game-changer!'

"Grrr, this is getting annoying!" Serafall threw a small fit.

"The problem with you Lady Leviathan is that Master has that mindset that you always have Devil kind as priority before him. That's is why he is keeping you at arms distance." Grayfia said simply.

This make the black-haired devil quickly take a thoughtful look.

"True… I suppose I should stop with the whole Lucifer thing with him.

Right… I should take whole thoughtful wife mindset instead!" The current Leviathan snapped her fingers as she realised this.

The silver-haired maid sighed hearing that. The amount of ability to adapt the older Sitri has is quite absurd even to the devil kind as a whole. Maybe that's the whole water manipulation side effect that affects that family as a whole…

"That would be for the best. The less reason he has to be annoyed with our kind the better." Venelana said from the side as her hands were crossed. There is some sweat running down her forehead.

She was thinking about the consequences of the scale mail to the rest of the supernatural world.

"Indeed… well what do you think about this? This is your first time seeing Marcus in proper action." Serafall asked curiously.

Venelana sighed for a moment.

"As humans say: we are royally fucked."

~~~~~~Next Morning~~~~~~

Marcus was eating breakfast and was about to watch some morning shows. It's when he realised that all the morning shows were talking about some sort of military experiment going on above the Baltic Sea.

"The sound generated by this experimental plane should be above that of any known planes. As the thing broke the sound barrier multiple times over. The sailors reported that their ears were getting bombarded by sounds of cutting air…" 

The teen hummed hearing that.

'Right by breaking the Sound barrier, the whistling sound intensified. Besides I was flying quite low. Fascinating data.' 

~~~~~~~~~Inventions/Tech/Sacred Gears~~~~~~~~~~~~

Freedom Scale Mail MK I

The prototype Scale Mail armour built by Marcus, it uses both magical means as well as technical means to create the perfect blend of both.

Classification: Pseudo- Longinus Sacred Gear

Composition: Sacred Gear alchemical metal, Diamond, transmuted electronics, plastic, rubber.

Key magic system and technology:

Exoskeleton system: A support system to control the scale mail. It reads users movements and thoughts and assist the user in controlling the Scale Mail.

Aurora OS: The scale mail runs on Aurora OS and is connected to the main Database in Marcus Garage.

G-Force Support: A System designed to mitigate the G-Force which scale mail is exposed to when flying at high speeds.

Diamond Triangle Core: Modified version of Diamond Core Heart based for Scale Mails. It's used as a main power source for the Scale Mail and is independent from the users energy source.

Crystallised Energy Flight Support (or C.E.F.S for short): Magic energy crystallized in form of wings. It gives unprecedented ability to fly. 

Solomon's Negation Magic Support System (or S.N.M.S.S for short): Specific type of energy is dispersed through the energy wings which affects other types of energies in the area of effect(AOE) type of fashion