Sitting in the middle of a meadow, watching a bunch of people working on the fields, I could only let out a sigh.

I'm really in trouble, aren't I… Who would have thought that they decided to choose the mission for me because I took too much time pondering which one to undertake. And to make matters worse, they took the most dangerous one of the bunch.

Damn it, I shouldn't have hesitated and taken the DxD mission as quickly as possible, consequences be damned. Well, what's done is done. The only thing I can do right now is to face the music, even if I don't want to.

First of all, I need to understand my current situation.

Because of that joke of a job offer, I got reincarnated as Kay who I inherited all of his memories and body.

Well, since I've chosen Substitute as my origin instead of possess where my personality would have overwritten the original Kay's and taken over his body, I've been legit reincarnated as the man himself from birth and lived a new life without any knowledge of the Catalog until my past life's memories were added into my head.

I have to say, it was really a headache to have a whole life flashing before my eyes in a matter of seconds.

However, there was a small problem. Normally, my original memories should have been added to me at some point before the start of my story, but not before the equivalent of 13 human years old. Then why did I get them when I'm only 8?

Damn, I just regained my memories and I already discovered a bug I was told about by that representative. I don't know if I should consider myself lucky or the opposite for that.

Well, this isn't really important so I can let it go, especially when the real problem is this.

Taking out the smart device which I found by my side when I first regained my memories, I couldn't help but to frown in displeasure at the information displayed on the screen.

'Completing this world's main storyline and make sure that your foster sibling fulfills their destiny of becoming the Once and Future King', huh…

A mission that might be harder than completing a speed run no damage on Dark Soul. I'm pretty sure that I'm doomed to suffer, no matter what. That aside, there is something that intrigues me, which one is it?

It says foster sibling, but it doesn't specify if my sibling would be either Artoria or Arthur. If I'm in the main timeline, it would be Artoria but if this is the prototype one, then I'll get the male one... or maybe I'm in another and completely different timeline where I would get Morgan as my sister.

Nah, I don't see that happening. But if I could choose, I'd rather have Artoria than Arthur. It's weird to think this but I was an only child in my... past life, and I always wanted to have a little sister to dote on. Well, if he's cute enough, I think I also could dote on Arthur... but that's to see once I meet my future sibling.

But still, I wonder when they will get adopted into my family.

One of the reasons I didn't want to take this mission is that I barely have any knowledge of the Arthurian myth, much less the Fate one since I'm sure that the mushroom guy made a lot of changes about it.

At the very least, I remember a bit of the drama CD, Garden of Avalon, and some scenes that were shown in the anime or the games, most of them being Artoria, Lancelot and Mordred's background, which isn't really that much and helpful at all since I don't know how her journey went at all.

However, I at least know that one day, the heir of Uther Pendragon will be adopted into my family, becoming my foster sibling in the process. And then, at the age of fifteen, they will draw out the sword in the stone, Caliburn, because the dick wizard said so before heading out into a journey to unify the country under their banner. And finally, they'll beat the final boss being the dragon Not-Oberon Vortigern before becoming the King of Britain.

Umu, sounds like a Fire Emblem plot to me, especially with the final boss being a dark dragon and the protagonist being a lord...

Well, that aside, I don't know when exactly Ar... thuria is supposed to come over here, but it won't stop me from getting myself prepared for future events.

Given that I'm now Kay, future knight of the Round Table and Arthuria's sidekick in their journey, I can say that I'll definitely be involved in their adventure, whether I like it or not. Meaning that I'll have to go to war in the future.

So, the first thing I must do is to become strong enough to shrug off everything in my way. And fortunately, with that Catalog, I think I'll be able to achieve that very soon.

Hopping on my feet, I then quickly headed to the local barracks where I would find the person who will help me get a head start on this arduous journey.

"Father, please teach me how to use a sword!"