"I can't believe it but it's true! You actually succeeded in casting a spell from that book!" Fuyuki squealed in excitement. "In all the time I've owned the book I've never been able to do that even once, and now I've finally found someone who can!"
"I don't know whether it's anything to be excited over." Minami said regretfully.
"You don't seem to know what kind of power you have in your hands; True Magic is something those pathetic human magi yearned for all their existences, yet you have it in your hot little hands." Gilgamesh suddenly explained despite being the one who initially dismissed the book and tore it with his bare hands...
"But I don't even know what speaking any of these incantations would result in..."
"Ever wondered why "magic" was called Magecraft in the Nasuverse? Because the creators were blatantly trying to get the point over to the viewers that the world's magic was in fact not magic. Complicated I know but that's the Nasuverse for you. Almost makes me wish I was born in this world instead..." Gilgamesh said randomly.
"Gilgamesh, didn't you destroy this book weeks beforehand? Then why did it reappear in the school library?"
"Duh, it's a fucking magical book; of course it will regenerate if it's destroyed. Reminds me of the Book of Darkness even though I shouldn't even know about that..."
Just when the conversation was getting nowhere, a plot device suddenly appeared at the front door; on closer inspection it was actually a man in a professional attire consisting of a black suit and stereotypical sunglasses knocking at the door. Fuyuki got up, confused at why such a man would randomly appear.
"Hello. I'm from Death Service." the professional man professionally said.
"Death Service! The very same group that called me last night? What does that have anything to do with this?" Minami was confused.
"I've come to confirm your ownership of the Explosive Montage Tome. As you've already used it's services you'll have access to even more which will come to you in due time." the man explained.
"You're not talking about this book here are you!" Minami sounded rather shocked.
"Why yes. And you must be the Minami Iwasaki I talked to last night. Pleasure to make your acquaintance." the man walked up to Minami and shook her hand, who returned the greeting.
"In that case you should be able to answer my questions about the book." Minami sounded quite serious; she wanted light shed on the situation as quickly as possible.
"That I can do. Fire away." His approach to the situation was rather casual, but then again something like this would be nothing to him.
"What exactly is the 'Explosive Montage Tome'?"
"It's a magical tome that allows the one who reads it to use magic by reading out obscure incantations which don't make any sense. The moment someone has the potential to perform one of the spells correctly their life will change forever under that spell's effect. 'Mana' is taken from the user to maintain the spell's effect as in the situation you're in; to obtain more mana you must take it from others forcefully, which can mean death for the ones involved. It is only when this happens that you become a member of Death Service..."
"Wait...you're saying that innocent people are dying for the sake of keeping this 'spell' in effect? That means...Gilgamesh truly did resort to the killings..." Minami lamented.
"Of course, it's what you decided. You still feeling bad about it?" Gilgamesh said mockingly.
"Regardless of whether you directly perform the killings or it's the effect of the spell itself, you obtain mana. You also fulfill the obligations of Death Service, which is to obviously kill." the man continued.
"Wait, what does 'Death Service' have anything to do with this? Did you create the Explosive Montage Tome?"
"You'd think so with our interference, but no. You see, the Explosive Montage Tome is actually a grand manifestation of the absurd desires that dwell within each and every human, with the incantations representing the incomprehensibility of the minds that the desires come from. Whoever casts one of the Tome's obscure spells ends up materializing the desire of one or multiple individuals; this is why Gilgamesh, who's supposed to be a fictional character, has appeared in this world as real as any human. As for Death Service, we exist as a manifestation of the Explosive Montage Tome form the after-effects of a spell to help guide it's user to their true desire. As it's user, you are able to use any amount of spells but you won't know what they'll do; the spells are constantly changing in the book based on the desires of those who are alive, and thus Death Service requires that humans are to fall in numbers to increase the quality of desires in the Tome. The more spells you use the greater understanding you'll have of the incantations meanings, allowing you to be able to choose what kind of spell you want to cast; think of it as learning a language. Death Service will even reward your killings by giving you the understanding of one spell for free; it'll most likely be one that will help you greatly, one that you want. Somewhere in the Explosive Montage Tome is YOUR desire, and once you cast the spell as your own desire, your existence will be complete. Any questions?" The man finished his absurdly long explanation which the ignored Fuyuki actually took the liberty of writing down.
"So...I have to 'kill' people in order to have what I, others, want?" Minami confirmed. No normal human would ever want to kill for selfish desires, especially not Minami.
"That's right. And speaking of killing, you've managed to slay...7 so far. Not too bad, but you can do better.
"I killed seven people, huh? Funny, I don't even really all that bad about it...no, I don't feel anything at all for them. Is it because I've only heard of the deaths in words that I want to deny to a degree? Regardless, I know this Tome's effects are very real, and the summoning of Gilgamesh was an accident...but...I've come to like him. For all he's seen as in fiction, he's a different person here and I want him to stay with me forever. I want to be understood...acknowledged by him. I'm treated by him differently than other people, and it feels good."
"Anyway, for your efforts you shall be granted a reward from Death Service; read the Tome and you'll see what I mean." The man finished before vanishing in front of everyone.
"A Tome that materializes humanity's desires? I've never heard of such thing." Fuyuki said.
"I see that this isn't the world I'm familiar with; that Tome should be in my treasury but isn't. Seems this guy's playing with you Minami." Gilgamesh stated.
"A book that materializes the desires of others? Ironically, the materialization was something I ended up desiring. I don't want to use the book any further if it'll put me at more of a risk...but could the spells help me keep Gilgamesh if I could understand them? I don't want Gilgamesh to go, but I don't want anyone to die."