Red Sword Princess - (Mushoku Tensei AU, FutaEris!SI)

Disclaimer! This story is not set in the main timeline of Mushoku Tensei. Rudy is not reincarnated (or born a boy) and thus the Mana Accident is not bound to happen. MC is also a guy stuck in a futa's body and... the futa is a member of the Boreas branch of the Greyrat family (reason why I am bringing this up is tied to their libido); lastly, expect this story to not have high stakes since most of the biggest threats are several years away from being a genuine concern and, when those happens, MC will not be unprepared.

Also Warning! This story my involve: Futa, Futa-on-Female, Futa-on-Futa, Futa-on-Trap, and (potentially) Futa-on-Dragon. You've been warned.

Eris Boreas Greyrat, first child and daughter of Philip and Hilda Greyrat. Noble girl of the 'Boreas Branch', fierce redhead known for her temper and...

Me.

I think a bit of background is further needed, this time highlighting how I got stuck in the body of a 'normal' girl. I am not sure what killed me, but I remember dying. Maybe it was the trauma of that end that truly clouded my mind on how that happened, but that still didn't mean I forgot 'dying'. And then be born again.

I remember screaming as loud as I could, my voice infantile if not outright super-squeaky. I heard people talking, their words making no sense to me as I was brought before... two familiar faces. Goofy-looking brown-haired man (Philip/dad), red-haired stern woman with a proud smile (Hilda/mom), and then I was left under the care of a few maids under the vigilant watch of an older man with a stern look, brown-hair, and thin mustaches (Sauros/Grandpa).

This first contact was indeed shocking. I may have been a disoriented, but these faces eventually helped me develop a theory on what was going on: I had been reincarnated as the Genderswap version of Eris Greyrat and... how fucked was I? I mean, the real point of Mushoku Tensei was for Rudy to be reincarnated and have the hots for his shortstack teacher, his childhood friend, and then his cousin.

I was the cousin, and I was male now. Or that was how I felt at the time as I could clearly feel 'something' between my legs.

I had been worried I was born female early on, but the feeling of having an underdeveloped tool gave me a false sense of security... that became hollow as soon as I learned what was my name.

Eris.

And that my body was indeed developing in a feminine fashion. By the time I was eight, I could grimace over my own nude reflection as it was telling of my current predicament. To the world, I was indeed a girl but-

I had a fully-working dick and pair of balls. And a pussy under the cum-tanks. I was born a futa... was that even canon? What the hell just happened? Did my insertion cause this?

I wasn't even sure of the logistics behind the situation- actually, how different things truly were? I mean, I got reincarnated- did this happen because of the same reasons as in the series? Was Rudy also a reincarnated guy?

I was stuck with many dilemmas, but I could hardly check those on my own for many reasons. One of those was my age as no one could take me too seriously, another was the fact that I didn't want anyone in the family to 'remember' Paul (he wasn't remembered 'fondly), and I really didn't want to shake the boat too much.

I was dabbling in a lot of questions which I had no answer to, and trying to solve those would only cause me grievances over the potential butterflies this may cause. This was, however, far more difficult that it sounded.

After all, I wasn't as unwilling as OG Eris was in learning about history, geography, and magic. The last bit pretty much rendered any idea of hiring Rudeus a bit unwarranted and... yet I saw the point in that diversion. The last thing I needed was a fellow insert to lust after me, thinking I was a full-on girl when I was possibly packing more heat than he was.

Yes, I was quite aware of my size despite the age, and the fact that I had started to get 'nightly releases' meant that I had matured down there faster than expected. Was this because of the bloodline or magic was to blame? The former made far more sense considering how many horn-dogs existed in the Greyrat family, we were litarally known as the 'beast-folk fuckers' by some of the more crass rivals of ours. Not without merit, however, as Grandpa Sauros had his own harem of young animal-eared maids that were, surprisingly enough, very eager to please him.

I would say it was a matter of power-dynamics coupled with a lack of genuine cruelty from grandpa. He had a rather traditional view on slavery of beast-folks, but he was also unwilling to 'hire them young' because it made him feel 'sick'.

Considering the context, it made something of a sense. It still didn't 'appease' my modern view of things, but I could understand why slavery happened in this world and why it can't just be dispelled by a wave of radical thoughts - I definitely was not going to touch any sort of politics until my bark could be matched by twice the bite.

So, I focused on being a normal girl, still be a prick to some people that pissed me off and then... we found Ghislaine. I wouldn't say it was a random encounter, especially when Sauros had planned to take me outdoors to check some disturbance within the fields as someone mentioned a thief had been spotted lurking by the storage areas.

We found Ghislaine slumped on the ground, a weak mess that was just asking for one thing.

"P-Please... water."

Sauros was reluctant, I was not. I walked up to her, ignoring gramps' warnings as I crouched down and offered some of the water from my flask. Ghislaine didn't hesitate, she drank greedily and almost finished the entire content of the flask and yet paused as soon as she realized what she was doing.

"S-Sorry."

"You entered our domain unannounced. There will be a price to pay," Sauros warned. "What's your name?"

"Ghislaine Dedoldia," She muttered while getting up. She was just a beauty- even better to see personally than through an anime scene or a manga panel. "I will pay whatever is due- I didn't intend-"

"As much as I would like to hear your story, my grandfather is right," I sharply interrupted, knowing I couldn't exactly play nice with Ghislaine because 'I had meta-knowledge'. Ghislaine had broken into the domain of a noble family with the potential interest to steal food from us. While she had none of that on herself and there was no evidence of her consuming any food, that didn't stop the suspicions behind a potential crime being stopped. "Ms. Dedoldia, this is the Boreas domain. My name is Eris Boreas Greyrat, my grandfather Sauros is the former lord of this land as he relinquished the domain to my father. This doesn't change the fact he is right - you are due to a crime. It may not be theft, but this is still worrisome. So, I am willing to make a deal... if you have the value I am looking for."

I could 'hear' Sauros tensing up at this last bit, but he let me speak as I studied Ghislaine a bit much to her confusion.

"What's your level with the Sword?"

I already knew the answer, but I had to ask it since no one knew that Ghislaine was a Sword King around.

"Sword King," She answered without hesitation, and I nodded.

"I believe you. And I wish to ask you another thing: if I was to hire you as my teacher to train me on how to use a sword for 2 Asura Gold coins a month, would you accept it?"

"Eris," Sauros remarked gravely. "This woman had just broken into our family's land."

"But not without a peculiar set of events leading up to it. It is not like you could have known. What's the exchange of two Gold coins?"

I had noticed her reluctance to answer the previous question, and I made my point clear as she was unable to answer this question too. This time, however, it was less about reluctance and more about ignorance.

"I don't... know."

"Ten silver coins, which is also a hundred bronze coins. Bread is two bronze coins. Which in turns means that with a gold coin you can buy the equivalent of fifty breads."

Her eyes widened in surprise. Basic math was indeed something Ghislaine was familiar with, but her reaction gave me the chance to press my advantage.

"Ghislaine, apologies if this sounds 'harsh', but you are incapable of reading and writing, which in turns got you in some silly situations because you are a 'straightforward person'."

"H-How-"

"Your outfit. Simplistic, it barely covers your frame," I hummmed, interrupting as I got a bit 'Sherlock Holmes'-y here out of giddiness to get her under my control. "You have a minimum of care for your modesty, so that in turns means you are not one to focus on details. You expect those with a friendly smile and a confident voice to be honest with you but... that's not the case, is it?"

Her shock melted in a gloomy look. "No."

"So, here is how things are going to go and I am sure father will approve of the idea," I hummed as I turned to Sauros. "Ghislaine shall teach me the way of the sword for two gold coins a month out of my monthly allowance, she will be given guest rights as she will also work as my personal guard for a full year and, if she does her job well, I will up her salary to three golden coins."

It was a scam for Ghislaine. She could definitely ask for me- hell, I am sure that a lesser level would demand five gold coins at least so... this was just me milking the opportunity as Ghislaine was a frugal woman. She didn't need to drown in cash to be happy and she could see a better life ahead of her.

"So?" I hummed, turning to her and... she nodded.

"I accept."

Dad approved, mom was annoyed, Sauros was... proud of me. Sorta. It was a mixed thing, really. I stood up for myself, made a fair point, but I crossed his authority and, the only reason I 'did not get spanked' was because I brought in a 'fine speciment of beast-woman'.

Ah yes, sexism as work. Couldn't blame the old man, but I doubted he would survive an attempt at Ghislaine's cave. Not with the chances of going eunuch after that try. He was a pervert, but he seemed to pick up within a week that Ghislaine was indeed simple-minded, but far from dim.

Even as we started to focus on what we agreed on, I also gave her brief lessons on reading and writing. She was hooked to it as soon as I mentioned it would be for free. She would take months- no, years to be fully geared up to know what is going on with words that were up to 'her level'.

Now, a week had passed and I could say things were going to be fine with Ghislaine. I was getting beaten up a few times through her crude lessons, but I was learning from her, but there wasn't enough to truly say 'something is developing' beyond the teacher-student bond we had.

No, this week-long mark was not about Ghislaine. It was about my father deciding that... it was time for me to have my personal maid.

So I was off to buy a slave with my grandfather. And I hated myself for it.

AN

Take your bets on 'what' might be Eris' first maid! The lewd will start by next chapter.