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Overlord Fan-Fic Major AU: A Heretic’s Innocent Changes in the Setting

First off, I want to say I suck at writing both a synopsis and/or summary, so this will be pretty straightforward. This story will be set in the Overlord Light Novel universe with several characters from other universes, with the setting being before the official launch of the game Yggdrasil, with the main character being the highest leveled admin. The main character is an OC and is the older sister of Ainz. In this story, there are only females and futanari. All male characters from any of the universes will be gender-bent female versions, and a couple will be futanari. The universes the characters are from except my Ocs are listed below: Overlord Date A Live Highschool DxD Naruto My Hero Academia RWBY Sword Art Online Akame ga Kill All tags for the story will be listed below: [Yuri] [Reincarnation] [Romance] [Fantasy] [Action] [Adventure] [Comedy] [Magic] [LGBTQ+] [Harem] [Massive Harem] [Multiverse? Maybe?] [Crossovers] [Massive Crossovers] [AU] [Major AU] [Overlord] [Date A Live] [Highschool DxD] [Naruto] [MHA] [RWBY] [SAO] [Akame ga Kill] [OCs] [System] [RPG] [MMORPG] [VRMMORPG] [DMMORPG] [Virtual Reality] [LitRPG] [Dungeons] [Dungeon Management] [Guild Management] [Kingdom Building] [God-like Female Lead] [OP From The Start] [Non-Human Protaginist] [Female Protaginist] [Non-Human Characters] [Older Sister] [Younger Sister] [Possible Multi POVs] [Antihero] [Demons] [Angels] [Demi-humans] [Elves] [Monsters] [Humans] [Non-humans] [Dragons] [Yandere] [Cute] [Fluff] [Past Lives] [Ships] [Slow Updates] [Inconsistent Updates] [Slow Burn] [R18] [Futanari] [Some Limes] [Some Lemons] Disclaimer: I do not own any of the characters or the world [or worlds (I might do a multiverse)]this fanfic is set in, all I own are my OCs and this fanfic, and maybe the gender-bent versions of the characters and the changes in personality for some characters, but I do not know for sure so don't quote me on that. I also do not own the world [or worlds (I might do a multiverse)] this fanfiction is set in, except maybe some parts that I am changing and/or adding, but don't quote me on that. All references go to their respective owners. I do not own the series Overlord or any of it’s characters. I do not own the series Date A Live or any of it’s characters. I do not own the series Highschool DxD or any of it’s characters. I do not own the series Naruto or any of it’s characters. I do not own the series My Hero Academia or any of it’s characters. I do not own the series RWBY or any of it’s characters. I do not own the series Sword Art Online or any of it’s characters. I do not own the series Akame ga Kill or any of it’s characters. All rights for them go to their respective owners/parties. Disclaimer: I do NOT own the image that is set as the book cover. It is only there until I am able to get a real cover for my fanfic. If you are the owner of the image used and you don't want me to use it please let me know and I will take it down. I do not own any of the images/WIPs/GIFs/etc. used in this fanfic as I suck at drawing and such. All rights for them go to their respective owners/parties. Note: This is my first fanfiction, and it is my first time writing R18 content, so it might not be great, and there will not be a lot of R18 content, it will be more cute and fluffy most of the time rather than smut. All characters used in R18 scenes are 18+, none of them are underage. Note: I am a perfectionist, so I will have my chapters be quality over quantity. There will not be a set schedule for chapter releases for a couple of reasons, one being that I'm still a student, and the other major reason is that I'm primarily writing this for my own enjoyment only.

Xenoveia · อะนิเมะ&มังงะ
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6 Chs

Chapter 2 My World YGGDRASIL

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Starting this chapter, the MC and the younger sister will have a name. Still the MC's POV and First Person POV.

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I started to turn on my developer's version of the game YGGDRASIL. My mind shifted to the game's waiting room for logging in. Once my mind stabilized, I started to login into my admin account, which has the highest authority compared to all the other admin accounts.

Once I fully logged into my account, I decided to change my avatar's appearance and name.

[Change Name:] [Lily Mizuki]

[Comfirm] [Cancel]

After typing my name, I clicked confirm. After that, I started to build my character up from scratch. Starting with making a completely new race that only I was able to have.

(A/N: Check the appearance section of the character Lily Mizuki in the auxiliary chapter "Character Bio Sheets" to see the appearance of Lily Mizuki, 'cause I'm too lazy to type all that again.)

After spending several hours critiquing my avatar, I finally finished. I checked the time to see how long I spent making my character before fully diving into the game, and I saw that it has been 16 fucking hours since I started making my character. Oh god, I better log in now before my little sister gets any more worried. I chose the world of Helheim since that was where I was supposed to meet up.

Once I fully logged into the world, I immediately contacted my little sister. She said that her player ID was Momona, so I sent a private dm to that player ID.

{Hello, I'm your big sister. I am so sorry that it took so long, I have been making my character this whole time. I'm so sorry. I'm a failure as a big sister. I hope you can forgive me for I have sinned.}

I got a reply back, not even 15 seconds later.

{Hi onee-chan, I was wondering what took you so long. Though, I should have expected this to happen. You always spend hours creating characters. I love your player ID, it's so beautiful. Lily Mizuki, The Beautiful Moon of Transcendence. Oh yeah, tell me your coordinates so we can meet up. I love you and I'll see you soon.}

I replied back almost instantly.

{Hi, my coordinates are (A/N: some numbers, I don't know coordinates well), and I love you too, see you soon.}

After about 30 minutes or so, Momona showed up. I was so excited, that I gave her a hug right away.

(A/N: for Momona's appearance refer to the auxiliary chapter "Character Bio Sheets".)

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Third Person POV:

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"Woah onee-chan, you look so badass and beautiful. I can see why you spent so long on your avatar." Momona said endearingly.

"Hehe, thank you, that's very sweet of you Momona," Lily responded shyly.

"Aww, I'm just speaking the truth, onee-chan. Also, what kind of race did you select?" Momona asked curiously.

"Well... I kind of created a new race..." Lily muttered quietly, but not quite enough for Momona to not hear.

"... I expected nothing less of you, onee-chan. So, what kind of race is it?" Momona asked again.

"It is a hybrid race with several different races combined. It contains the races: Celestial, Primal Elemental, Archdevil, Dragonoid, Succubus, True Ancestor, Slime, Lycanthrope, 12 Tailed Kitsune, and Dryad. Is it too much?" Lily shyly answered.

"... Damn onee-chan, are you trying to become the greatest World Enemy or the Final Boss. What kind of ridiculously overpowered race is that!?" Momona said baffled by the absurdity of what she just heard.

"Well, I didn't want to just stick to a standard race, and I wanted to have a race that only I would have. I didn't mean for it to be on the same level as a World Enemy or a Final Boss." Lily said embarrassed while starting to pout.

"Still onee-chan, you really outdid yourself this time. As expected from my onee-chan" Momona said teasingly. *Insert teasing face*

"It wasn't my intention!" Lily yelled out embarrassed while still pouting. *Insert pouting face*

"Hehe, I just messing with you, onee-chan. You are so cute when you pout." Momona said teasingly with a smug face. *Insert teasing smug face*

"Shut up! I am not!" Lily yelled out embarrassed with her face being as red as a beet.

"Anyhow, what race did you pick, hmm my adorable little sister?" Lily said to change the topic away from herself.

"Well, since you must know I chose a Living Skeleton Mage," Momona answered playing along with Lily since she knew that Lily was trying to change the topic out of sheer embarrassment, cause Momona knew that if she continued to tease Lily it wouldn't end well for her.

(A/N: Momona's race will eventually evolve into a Living Elder Lich, and eventually evolve into a Living Overlord, after meeting all the requirements. The only character that will start off insanely OP in the game YGGDRASIL is Lily Mizuki. I will keep the flow of the game levels like how it is in the Light Novel, with the exception of a few characters.)

"Oh, so you're going for the magic route?" Lily asked inquisitively.

"Yeah! I'm going to become the most powerful magic caster there is!" Momona passionately exclaimed, with a child-like tone, like one would have when talking about their dreams.

"Okay then, if that is what you want to do, then we best get started on our adventure," Lily said endearingly.

"Your right, we have to get started, or I'll never become the strongest magic caster. That would be horrible!" Momona said.

"Hehe, your right, so let's go," Lily said while starting to move toward whatever adventure awaits them.

"Hey, wait for me," Momona said while running after Lily.

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Time skips, cause I'm not going to write 10 years of gameplay. Still Third Person POV.

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It has been years since Lily Mizuki and Momona started playing YGGDRASIL together. At first, they just partied together, doing whatever they wanted. Eventually, they made some friends believe it or not. At first, they started off as a small group of 10 people eventually. Eventually, the small group of friends all decided to make a guild together, and name their guild Ainz Ooal Gown, while making both Lily Mizuki and Momona the guild masters of the guild. The guild decided to conquer a dungeon located in the world of Helheim called; The Great Tomb of Nazarick and made it their guild base. Over the years the guild rivaled the top-ranking guilds, and they became known as an unstoppable force that one could never hope to defeat. The guild base was absolutely massive in its size, and nothing could compare to it. It has 20 different floors in the guild base with hundreds if not thousands of high-leveled standard and custom NPCs. Lily Mizuki personally created the last 10 floors of The Great Tomb of Nazarick and the custom NPCs that guard the last 10 floors; while Momona created the standard NPCs that guard the last 10 floors.

(A/N: The first 10 floors are going to be the same as the original.)

The 11th floor's name is The Ancient Roman Empire. The floor's appearance is remarkably similar to the Ancient Roman Empire's capital; to the point that one would think you went back in time. The Floor Guardians for this floor are; Raynare, Ochaco Uraraka, Reiko Yanagi, and Himiko Toga. This floor also has Roman Legionnaire Golems high-leveled standard NPCs all around and throughout the capital, the city surrounding the capital, and even outside of the city walls, although not a lot of them are outside the city walls. This floor is the largest floor out of all 20 floors, even putting the 6th floor to shame with its size, and this floor is mainly used as what an empire would be used for, be it housing, farming, arts, training, or whatever else, this floor covers almost everything. A majority of standard NPCs live on this floor within the safety of the walls of the Ancient Roman Empire.

The 12th floor's name is R&D. The floor's appearance is what would be called a techno-city. Although this floor is not bigger than the 6th floor it is still one of the biggest floors out of the 20 floors. This floor is mainly used for research and development, and other forms of crafting like blacksmithing, woodworking, enchanting, and so on. This floor's Floor Guardians are; Kyoka Jiro, Momo Yaoyorozu, and Coco Adel. Other than them the floor has an absurd amount of automaton-based high-leveled standard NPCs that guard this floor.

The 13th floor's name is The Sanctuary of Álfheim, named after the world Álfheim in YGGDRASIL. This floor's appearance was what could be considered the calmest, most beautiful, and peaceful of all floors. This floor has a baby World Tree in it, that Lily Mizuki personally made, with her authority as the highest-leveled admin making it on a higher level than any World-Class Item. This floor's Floor Guardians are; Kirito and Asuna. The standard NPCs that lived on this floor were all creatures of the fae, ranging from fairies to dryads, to elves, to literally any other creature of the fae. This floor is considered the second largest floor of the 20 floors of The Great Tomb of Nazarick.

The 14th floor's name is called The Plains of the Forgotten Past and Remembered Future. This floor, in particular, is one of the most complex floors out of the 20 floors of The Great Tomb of Nazarick. The reason for this is because the floor is covered in the highest leveled and complex illusion formations. Although the 14th floor is a relatively small floor, the illusion formations make the floor look like it is endless. The illusion formations on this floor can show any kind of illusion, and it can even make some illusions become part of reality. The Floor Guardians for this floor are; Rumi Usagiyama and Raven Branwen. The standard NPCs for this floor are ones that are ethereal, incorporeal, and intangible entities like those of the spirit race.

The 15th floor's name is The Supreme Temple of Heavenly Chaos. This floor's appearance is like that of the supreme temples in Ancient Rome. In this temple, a statue or statues of whatever you think or consider to be a god and/or goddess will appear before you for you to pray to. This floor is the hub of resurrection for all entities affiliated with The Great Tomb of Nazarick. The Floor Guardians for this floor are; Gabriel and Naruko Uzumaki. The standard NPCs for this floor are priestesses of all and any manner of religion.

The 16th floor's name is The Forest of Death. The appearance of this floor is a carbon copy of The Forest of Death (also known as The Forty-Fourth Training Ground) from the Naruto series. The Floor Guardians for this floor are; Hinata Hyuga and Anko Mitarashi. The standard NPCs for this floor consist of large amounts of Lamias, large amounts of Arachne, and many different species of humongous poisonous creatures mostly snakes and spiders.

The 17th floor's name is The Mountain of Death and Ice That Reaches The Throat of the World. This floor's appearance is a carbon copy of The Throat of the World from the Elder Scrolls series. This floor houses some of the most powerful NPCs in all of Nazarick rivaling those of the 8th floor. The Floor Guardians of this floor are; Esdeath and Akame. Some of the other NPCs on this floor whose power rivals the Floor Guardians consist of several high-leveled custom NPCs dragons of each kind of dragon, as well as some custom NPCs that are immortal humans like Aureole Omega, and have an unfathomable amount of knowledge.

The 18th floor's name is The Castle of 100 Demons. This floor's appearance is that of a Japanese-style castle from the Warring-States Era. The Floor Guardians for this floor are; Koneko Toujou and Kuroka Toujou. The standard NPCs for this floor are 100 high-leveled different Yokoi, one of each of the 100 demons from the Night Parade of 100 Demons.

The 19th floor's name is The Garden of Eternity. This floor's appearance is that of a garden of immense beauty with all kinds of different plants and flora, forever in bloom. The garden has sections of beautiful trees like cherry blossoms, or plum trees, among many others. There are some sections of the garden filled with all kinds of different flowers like water lilies, hydrangeas, roses, lavender, among many others. The Floor Guardians for this floor are; Neopolitan, Velvet Scarlatina, and Akeno Himejima. The standard NPCs for this floor are just normal maids tending to the garden.

The 20th floor's name is The Palace of Infinite Time and Limbo. This floor's appearance is the most confusing of all 20 floors of The Great Tomb of Nazarick. The appearance of the floor is always changing, yet never changing, it is the embodiment of infinite time and limbo. The only people who are able to move freely on this floor are those that Lily Mizuki allows. This of course includes the Floor Guardians of this floor; Kurumi Tokisaki and Ophis. There are no standard NPCs on this floor whatsoever. If you do not have permission to move on this floor, you will forever be trapped in the infinite limbo of time. For those with permission to move throughout this floor unhindered, the floor will have the appearance of a domineering palace that is a mixture of both western and eastern cultures and looks.

Have some idea about my story? Comment it and let me know.

I might add a side story about the 10 years in the game YGGDRASIL in the future.

The next chapter will be the final day of the game YGGDRASIL.

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