She is not an investigator.

"Congratulations, meow! You found my lost toy, meow... Now there are only five left, meow."

The white cat hugged its box, stuffed the red ball inside, and happily wagged its tail.

"The rest..."

"No rush, meow! Igris meow has already tried her best, meow. I didn't expect Igris meow to find one of the meows so quickly."

The white cat seemed very happy, while the black cat was much quieter in contrast.

Perhaps because there was still no news about her book, she seemed uninterested and kept yawning.

"besides."

Igris stretched out her hand, and in the void, another hand grasped hers, gradually revealing a figure almost identical to her, except for the color of her hair.

"she…"

"Meow?"

Both the white cat and the black cat were stunned, seemingly not expecting her to suddenly appear there.

Of course, Igris assumed they would find out.

"You've brought me to a great place."

"...?"

"Igris meow? No, wait, meow..."

The white cat was thrown into confusion, but the black cat reacted very quickly and immediately pulled the white cat away from where it was still stunned.

The next moment, a sharp blade suddenly fell from the ceiling and landed in front of the silver-haired figure.

"How long have you been playing house with these things? I bet not for long."

"and many more…"

"Shhh."

Her fingers were drawn up to her lips, and her cunning eyes were slowly covered by a silver-white mask, making one wonder if she could actually see.

"You just need to watch."

"White cat! She's the enemy cat!"

"Enemy cat...?"

Clang—!

As the blade fell, accompanied by a crisp, low thud, a burst of blood suddenly erupted from the dimly lit library.

The white figure slowly fell to the ground, her body split in two, and blood began to spread on the floor, staining the wooden floor red.

"White cat—!"

"Shh..."

She repeated her actions, flicked the blood off the knife, and walked towards the retreating black cat.

"Don't make a sound."

"—!"

The library fell silent, devoid of sound, from the dripping blood to the pitiful wails.

Black Cat tried to escape from here, to flee from the library, but the deadly footsteps behind her gave her no chance.

The blade rose and fell, blood gushed out, and the body collapsed to the ground.

The blood barely splattered on her, and she continued walking towards Igris.

Bloodstained footprints stretched out behind her, long and thin.

Finally, she stood before Igris and slowly raised the blade in her hand.

It was a silver scimitar, exquisite and dazzling. Its luxurious decorations made it look unlike a weapon, but it was indeed stained with blood.

The blade slowly sliced ​​across Igris's shoulder, stopping at her neck and brushing against her skin.

The cold touch made her blink involuntarily, but at that moment, she spoke again.

Why didn't you stop me?

"I just want to see how far you'll go."

"Hmph—what a stubborn fellow."

She slowly sheathed the blade, propped it on the ground, supported the hilt with her palm, and bent down.

"I thought you would try to protect them and then fight me."

“I did think about doing that… but my gut feeling told me you wouldn’t do anything to my advantage.”

"Your intuition is always very accurate."

She chuckled softly and straightened up again.

It was at this time that everything in the library began to change.

It was still dark here, but compared to the previous scene, it appeared more dilapidated and covered in dust.

Many bookshelves were broken, and the wooden floors had become even dirtier and more stained.

The sticky feeling is nauseating.

"They don't want you to see the truth."

She slowly walked to a bookshelf and kicked it over completely.

Beneath that bookshelf was a downward staircase stained with blood.

"Shall we go down and take a look?"

"I'll listen to you."

Igris glanced at the black and white cats' corpses. Unlike when they died, their bodies were much more bloated and gruesome.

That was definitely not a cat, but Igris really had a hard time identifying what kind of animal it was, but in any case... it wasn't a cat.

As they slowly descended the steps, a pungent smell wafted up.

"..."

"Now you can believe everything you see with your own eyes."

She pointed to her eyes, or rather, to the silver mask over her eyes.

The space below is not spacious, so the contents inside are very prominently displayed in front of it.

Two corpses.

The corpses of two cats.

There was a white cat and a black cat. The white cat seemed to have been dead for a long time; its body had begun to rot, and its flesh and blood were starting to dissolve.

In contrast, the black cat's body was still fresh, and it seemed to have been dead for only a short time, except for a huge wound on its neck.

It looked like his neck had been bitten off.

"This is…"

"Hmm—something has invaded this place, killed these two poor little ones, and taken their place, impersonating them in an attempt to achieve some purpose."

"—"

"Of course, I don't know the specifics, but this black cat probably died recently. Maybe it wasn't even in the library before?"

As she spoke, she walked up to the two corpses and picked them up without any hesitation.

Suddenly, my vision began to blur, and my direction began to shift. At that moment, the two cats transformed into human form.

However, they remained lifeless, their deaths tragic.

"Who exactly are they...?"

"It's just a pet, the librarian's pet, even though the librarian is no longer here."

"administrator…"

"Yes."

She turned her head and smiled at Igris.

"it is me."

"...?"

Igris' vision suddenly went completely black.

She tried to move her body, but to no avail.

As if enveloped in nothingness, her body began to gradually disappear without her noticing.

But not long after, only about two or three seconds, she regained consciousness.

At this moment, she found herself standing outside the library.

At the top of the stairs, two cats were lying, looking at her from the left and right.

"Now you can give that thing to them."

"...?"

The voice came from her mind; it was her own voice, or perhaps the administrator's.

She held a red sphere in her hand, and in front of her, two cats of different colors also appeared to be still dazed.

"I…"

"No need to ask anymore. From now on, you are also the librarian of this library."

"..."

"Meow...meow?"

The white cat suddenly rolled over, waking up from its daze.

She looked at Igris, her eyes changing drastically, and finally pounced on her without hesitation.