The Paternal Paradox - (Fateverse, MC becomes 'the' Dad)

Warning! This chapter (and story) contains a dangerous amount of: Diabetes-inducing situations, an excessive amount of SFW content, aplenty of Lolis and Shotas sharing a single dad in a wholesome fashion, and a general disregard for potential serious plot. So, you have been warned - enjoy the teeth-rotting BS I just cooked~!

Manchester. It's 2024. The air is stingy, the world goes sluggishly forward, and the Magus Association is still recoiling from getting nose-broken from the 'American Grail War' a few years ago.

The Studies into anything related matters is deemed forbidden and yet no major punishment is to be inflicted due to how hardassed the security is over all available information. Survivors are hidden away and books regarding the processes are kept in secret spaces.

...

This should not be the project of my life, but that's hardly a choice as the 2020s had seen most of the available subjects taken by other people at school- actually, let's just say that there are options but... I refused to demean myself any further!

My name is Aiden Vinson, I am reaching my 30s and I need to get somewhere in life to propel my non-existing family standing. I would say that mom was to blame for this long-standing ambition.

She was the one from some middling family that wanted to do, just like the other groups in the Association, some good shit and get recognition. It was a dream of hers for either herself or me to pull through and... Well, my American dad was all chill whatever path I took so...

After their death, I decided that I had to do something about it. Magecraft wasn't exactly an easy science- it was cool, but with no legit Magic Crest, there's no way someone can just make some impressive living out of it.

Hell, I hardly made enough money with odd jobs and any chance of making some insane discovery was thwarted by someone else.

My first attempt was to create a mana battery to counter the end of Magic. I didn't have any reservation over it being enough in a single unit, or for it to be able to restore magic to the point of the Age of Gods but-

But then Rin Tohsaka came along with a 'Nothingness-Conceptual Machine' that pretty much created stabilizing waves with our connection with Akasha. The entire thing acted as a form of 'artificial connection to the Root'.

It pretty much ruined any interest a battery of my invention could yield, and thus five years went down the drain.

I then tried to find a way to mass-produce mana-gems. Mom had something that was deemed a family heirloom that could handle an elevated capacity of mana with limited stress and for a lengthy amount of time.

I worked my butt off to try and revolutionize the system behind this, trying to create something fairly more capable of holding more energy and-

Luviagelita Edelfelt created low-powered gem-batteries at a cheap price. She is the sole producer and she is making fat stacks.

Two years, and I saw my trash bin growing fuller with painful memories.

The last attempt was the straw that broke my patience. I decided to switch it up- use magecraft for common uses such as cooking or house chores-

WHO THE HELL IS SHIROU EMIYA AND HOW DOES HE MAKE THOSE QUALITY SHIT FOR MAGUS' HOUSES!?

I felt... dead. Inside. And also outside. I had barely showered during the three years of pushing through a revolutionary project to create the ideal utensils and now...

Now I had nothing.

Well, mostly nothing. Manchester may not be London, but it was one of the Clock Tower's 'dumping ground' for irregular shit. Stuff that was deemed illegal and to be hidden away. The warehouse picked for this was also a place I had access to. I knew the owner, Frank, and he would let me into getting stuff that was easy to hide away on me.

And while I was browsing into the potentially-cursed shit around, I stumbled upon the gold in this pile of crap: papers regarding the Magus Association's own perspective on the last few Holy Grail Wars. The analysis was written by that witch Tohsaka, but the depictions were enticing.

I was annoyed that it was an incomplete tome, but it was still enough for me to work out the missing lines on my own. I thanked Frank, left for home, and wasted a month studying the papers.

What Rin described that got my attention was... You can summon a Servant without having to rely on a Grail. Within a stable Mana leyline, Servants can be summoned without demanding for a stabilizing factor and their souls would just return where they came from without forcing one to give up the energy of their presence to some big-ass chalice.

And Manchester existed in a middle-level stable leyline.

This was... ideal- no, it was perfect.

It took me a while to find the right resources, time the right moment to get the chalk lines on a solid surface in a nearby park, and not-so cheap candles. I was annoyed by the overall expenses, but the rewards were promising: having a Servant would allow me to have a reliable partner, a powerful entity to keep around, and... science material. I could write some anonymous papers and acquire a commission in private over more material.

This was the only thing left for me and- and I had to only want it.

I had everything prepared for the monumental nightly event, and I allowed for the chant to start. I didn't have a full one from Rin's analysis, but I could dictate the rest of the bits perfectly. To my delight, the ritual circle glew a mighty golden glow, and I felt a face-splitting grin appear on my face as I knew I was doing it.

I, Aiden Vinson, was going to be a legend too!

A blinding light erupted from the circle, one that forced me to close my eyes to avoid getting perma-blinded by it and... and then someone stood in the middle of the circle!

I peered through the returning darkness and... I frowned. A child?

The young girl with purple hair and pale-violet eyes was soon looking at me. Her dress was a bit revealing, but overall she appeared like a cosplay. As she caught me with her gaze, she smiled and paced up to me. A bit sudden, then a giggle and she tilted her head.

"Did you summon me, Mister~?"

It could be a fluke. Or maybe the girl was a tougher Servant than she looked. A glass cannon! Yes, that has to be it!

"Y-Yes. Introduce yourself!"

Ah yes, I got it right. Now, let's see who's this chi-

"Brat Class Daughter, true name Wu Zhao. Are you... my Father~?"

My smile collapsed again, this time not promising to come back.

"F-Father? Don't you mean Master?" And 'Brat Class' and 'Daughter'?! What is going on here?!

"Hmmm," Zhao tilted her head to the other side. "Nope. I am your Daughter now, Father."

Without warning, the kid just gave me a tight hug.

"Rejoice~!"

I am so not rejoicing with what the hell has just happened.

AN

First Daughter acquired! The system has indeed been twisted but... how is it possible that a few 'mistakes' can lead to this? Oh boy, there's more than Aiden's tinkering to blame for this disaster in the making... and it's only the beginning of the 'nightmare'.

S-Child Stats

True Name: Wu Zetian (Zhao);
Type: Daughter Spirit;
Class: Brat;
Strengths and Weaknesses: Same as 'Wu Zetian (Assassin);
Likes: Anything flashy and splendid, Her country, Changing names, Aiden (One-sided for now);
Dislikes: Cats, Ghosts, and Being Alone for too long;
Father: Aiden Vinson;