Chapter One:

Otaku. A Japanese word meaning Geek when translated into English. In modern times, the term Otaku has come to refer to a person with a particular fascination for Japanese culture, particularly manga, anime and video games. The Chaldea-security organization has a few otakus in their employment. Both relatively normal ones and a few… stranger ones.

Two of these stranger otakus are the Assassin-class Servant known as Osakabehime and her (adopted) daughter, named Plutia Osakabe since the adoption. Plutia wasn't always Plutia's name though. Her original name was Belladonna Potter, though she was mostly just called Bell, a shortened version of her given name, Belladonna. Like her (adoptive) mom, Plutia was an otaku, mainly focusing on video games, but still having an interest in both anime and manga. Something that Plutia inherited from her mom when she performed a blood adoption ritual was one of Osakabehime's Personal Skills, a mutated version of Chiyogami Manipulation Techniques. Plutia's mutated version of the Skill granted her a form of Papyrokinesis, Paper Manipulation, which she herself had dubbed Paper Mastery. A Personal Skill unique to Plutia, which had been compared to a very low-ranked Noble Phantasm, that caused her various paper constructs to adopt some properties of the real thing that the constructs were imitating, like a paper dagger gaining the cutting power of a real one but not the durability of a real one, was something that was quickly discovered by accident when she accidentally cut her finger with an enchanted paper dagger. The Skill was given the name Paper Phantasm.

Plutia got along with most of the various… characters of Chaldea. Some more than others, with the closest to bad terms being occasionally trading exchanges of banter or annoying but ultimately harmless pranks. The most common victims of Plutia's pranks were the perverts, though nobody bothered pointing out her hypocrisy, as it was something of an open secret that everyone knew that she had a stash of… a particular kind of manga hidden somewhere in her room and that she was actually quite a pervert herself, even if it was only in the closet or at least very subtle about it.

The fact that she had been seen looking at the various female Servants made it rather clear what her preference was despite the fact that she was only fourteen. Though considering that she didn't exclusively look at a specific… part of the female figure made some people wonder what it was about them that she found attractive. But there was something of a pattern in Plutia's subtle perversions, all of the Servants were known to be amongst the most powerful, and due to the fact that Plutia was part yokai, as of the blood adoption, it made sense since yokai were known to primarily be attracted to power and secondary gender. Though exceptions to this happened on occasion, Tamamo-no-Mae, a Caster-class Servant who was a true yokai was a notable example of this.

It was during the day of a particularly powerful blizzard outside the top secret base of the Chaldea Security Organization that something very… interesting happened. Most of the various personnel and summoned Servants were busy doing their own thing, including Plutia who was… enjoying reading one of her… special mangas in her room and doing something that is probably best left unsaid… behind a locked door. The fact that she had a tendency to use Paper Mastery to levitate and turn the pages of her mangas, leaving both of her hands free was, unlike the knowledge of her stash of… special mangas, something that everyone actually knew of, as had on occasion done so while reading some of her safer for work mangas in public.

When lunch rolled up, Plutia had finally exited her room for the first time since breakfast. Wearing only an oversized T-shirt, some underwear, though whether or not she was wearing a bra was unclear and a pair of comfortable shoes (but no socks). Much like her (blood adoptive) mom, Plutia had very long dark brown hair that shifted into a lighter shade near the tips, which was usually kept in either a braid or a long ponytail, depending on if it was a formal or casual occasion. But unlike Osakabehime's hair, Plutia's was darker, similar to the color of dark chocolate shifting into a normal chocolate brown near the tips. While no one was really sure why, many suspected that Plutia's hair was darker than her mom's despite the blood adoption was because of the fact that her hair was originally pitch black before the blood adoption. Something else that both Osakabehime and Plutia shared thanks to the blood adoption was a similar eye color, pink with the daughter's eyes being a slightly darker shade, being closer to magenta than pink in color. While it was probably attributed to her yokai-heritage, Plutia was sporting a rather buxom figure for her age.

As the half-yokai ate her lunch in peace, occasionally flipping the page of her manga that she kept afloat in the air within reading distance with her Paper Mastery, one of Plutia's colleagues, Mash Kyrielight entered the cafeteria, looking quite stressed out about something. Not that it was any of the magenta-eyed girl's concern.

"Osakabe, there's a mission for you. Head to the meeting room once you're finished here. Orders from the higher ups." Stated Mash bluntly, earning most of the half-yokai's attention. Most as in Plutia actually looked at the pinkette, but kept her manga afloat in the air with her Paper Mastery.

"Gotcha. Anything else I should be aware of?" Asked Plutia in a tone implying curiosity.

"The mission briefing will be over a video call, so get either your Chaldea-uniform or your personal mission-outfit put on on your way to the meeting room."

"Right. May I ask what the mission involves?"

"Two groups of Wizards are causing… a stir in Europe. The higher ups want you to investigate."

"Okay, but why me?"

"You're the closest thing to a Witch Chaldea has." Deadpanned Mash.

"*sigh* fine. Orders are orders. I don't really have a choice in the matter now do I? And why do I get the feeling that some information, like the where in Europe, was left out?"

"Don't ask me that. I don't know either."