Nanashi opened the Group Album.
The first thing he saw was a selfie from March 7th.
If he remembered correctly, she was someone who loved taking pictures.
Well… the photo was nice.
Might as well save it.
Returning to the chat interface, something occurred to him.
He checked his personal stats:
[User]: Nanashi Fumei
[Points]: 3,700
"3,700 points… over 3,000 zombies killed today."
It was time to try his luck with the Roulette Spin.
Opening the Roulette Wheel, he saw various possible rewards:
Abilities: Kaio-ken, Face-Breaking Fist of Friendship, Sharingan, Fire Magic, Mystic Eyes of Death Perception...Items: Death Note, Phone Booth, Poké Ball, Holy Sword...
Abilities were ranked from C-tier to SSS-tier.
His Physical Enhancement and Five-Elements Lightning-Dharma were both B-tier abilities.
"Let's see if I can pull something stronger this time!"
With anticipation, he activated the Roulette Spin—costing 1,000 Doomsday Points per roll.
The wheel spun rapidly, its pointer flicking past various power-ups and rare artifacts.
Mystic Eyes of Death Perception…Dragon Slayer Magic…Zoom-in and Zoom-out Lamp…
Under Nanashi's anxious gaze, the roulette wheel finally came to a halt.
It landed in a narrow slot.
[Congratulations! You have obtained an S-tier ability: Gemstone Vector Manipulation!]
"???"
A brief moment of shock.
Then—excitement!
And then—calmness again.
Vector Manipulation.
He knew this ability well. It was the supernatural power from A Certain Magical Index.
In that world, Accelerator—the #1 esper in Academy City—was a well-known user of this ability.
However, vector manipulation itself wasn't what made Accelerator terrifying.
It was his incredible computational power.
Even if others possessed the same ability, they wouldn't necessarily be as powerful.
Before Accelerator was injured, his brain functioned at the level of a quantum supercomputer.
Nanashi opened the ability information panel.
[S-Level Ability: Gemstone Vector Manipulation]
Upon fusion, the stone-based ability awakens—vector manipulation.
"Gemstone!"
[Note: Gemstone or Genseki also means Uncut Gem.]
Nanashi's eyes widened in shock.
If it were just standard vector manipulation, he might have been a little disappointed, knowing his computing power wasn't strong.
But a Gemstone? That changed everything!
In the world of A Certain Magical Index, Gemstones are naturally gifted individuals born with their own Personal Reality—innate supernatural abilities.
Unlike Accelerator and the vast majority of Academy City espers, whose powers are artificially developed and rely on calculations, Gemstones can use their abilities instinctively without needing to process complex equations.
Their abilities flow as naturally as breathing.
For example, if Accelerator wants to redirect a force, he must calculate the necessary vectors.
A Gemstone, however, simply thinks "Change." And it does.
Their abilities function like extensions of their will.
No calculations. No limitations. Pure instinct.
Excited, Nanashi took a screenshot.
Then, without hesitation, he fused with the vector manipulation ability and spent 1,000 points to upgrade it to Level 2.
Afterward, he shared the screenshot in the chat group.
[Group Chat]
Nanashi:"Just drew a new ability! [Screenshot]"
March 7th:"Wait, hold on! Nanashi, how do you have so many points? The roulette costs 1,000 per spin, and we only get a few dozen points when we sign in!"
Nanashi:"You don't just earn Doomsday Points from signing in. You can also gain them by encountering and reducing Doomsday Factors."
Nanashi:"In my world, there are evil spirits—classified as Doomsday Factors. Eliminating them grants points."
Nanashi:"I also stumbled into a doomsday survival game today. Killing zombies here earns points too."
March 7th:"I see… But we don't even know what our Doomsday Factor is yet!"
Lemuel:"Could it be Originium in my world?"
Aqua:"Hmph, in that case, I just need to destroy the Demon King's army!"
Saeko:"I don't even know what my world's doomsday is…"
Nanashi:"@Saeko, you might be dealing with zombies, but I can't say for certain."
Saeko:"Oh? If that's the case, I should start preparing. Thank you, Nanashi-kun."
Her trust was unwavering—even though Nanashi himself admitted he wasn't sure.
March 7th:"Enough about that! @Nanashi, what does your new S-Level ability do?"
Nanashi:"It's exactly what it says—vector manipulation."
March 7th:"…Yeah, that explains nothing."
Lemuel:"Honestly, I don't get it either."
Aqua:"Pfft! Sounds weird. It's nothing compared to divine power!"
Nanashi:"…"
Saeko:"…"
Great. Now there were three idiots in the group.
Saeko:"Ahem… Maybe I can explain it. A vector is a quantity that has both magnitude and direction."
Saeko:"As for vector manipulation…"
She hesitated. The concept was so absurdly powerful that even she found it hard to believe.
Nanashi:"You got it right. Vector manipulation allows me to alter the direction and properties of forces at will."
Nanashi:"However, in this setting, the concept of 'vector' extends beyond just physics."
Nanashi:"Aside from basic forces like momentum and electromagnetism, it also includes things like light, radiation, infrasound, and even oxygen distribution."
In other words…
The laws of reality themselves could be altered.
Of course, this was hippo physics—it defied real-world logic.
March 7th:"My head hurts. I know all these words separately, but together, they make no sense!"
Aqua:"Pfft! This goddess doesn't need to understand. Divine power is enough!"
Lemuel:"Incredible! This feels even stronger than Originium Arts."
Saeko:"The ability to freely manipulate vectors… that's insane."
Nanashi:"Haha, no matter how strong an ability is, it still needs to level up."
Nanashi:"Anyway, I'm feeling generous today. Here's a red envelope!"
[Doomsday Points Red Envelope Sent]