"Is this what the report calls the big hole? It's really deep. ”

Looking at the huge and deep ice cave exposed under the blizzard, Delissa sighed.

"Let's go, keep up."

Patting the other on the head, Otto stepped into the ice cave first.

Hurriedly answered, and Delisa immediately followed.

In its place, only the series of footprints that stretched from afar......

……………………

………………

The cave was not as dark as it might have been, which meant that the flashlight on Otto's belt was useless.

The wide cavern has obvious traces of artificiality, and a large white cube of stone bricks forms a passage that seems to extend from the depths.

Blue crystals are scattered around the surrounding walls, the only source of light for the tunnel.

(I just rewatched the comic plot of this paragraph, and at this time, Delisa fried chicken is cute, her eyes are very big, and she has dull hair)

"What's wrong with you?" Turning around, Otto looked at Delissa, who was holding on to the wall carefully.

"I didn't ...... It's nothing! I just feel like there's something wrong here. ”

The left hand touching the wall unconsciously touched a button, accompanied by a "click" sound. The surrounding ice walls began to move.

The surroundings, which had been blue, were now shrouded in a strange red light, and the moving ice walls formed another passage.

"This kind of technology ...... By no means of this era. ”

Looking at the changes taking place in front of him, Otto silently made up his mind to a conclusion.

The passage based on black and red leads into the distance, like the huge mouth of a dormant beast, which makes people feel creepy.

"Forehead ......"

Feeling the corners of his clothes being pulled, Otto couldn't help but snort.

Looking down at Delisa who was clutching her clothes, Otto, who shook her head helplessly, took the other party's hand.

"Stump, Tread, Tread—"

In the eeriely quiet space, only the sound of the soles of the two of them stepping on the ground.

Before they knew it, the two had finally come to the end of the passage.

Through the huge opening, which looked like a door, a huge circular field appeared in front of you.

It's a space the size of a football field, with ceilings about the height of a five-story building.

"Huh, dolls?"

In the center of the circular field is a woman in a black gown with a double golden ponytail.

Like a sleeping princess, the blonde lady sat on the ground with her head tilted.

"Could this be the indigenous people of this place?"

Standing in front of the woman, Delisa emerged from behind the pensive Otto.

Staring at the other party's cheeks for a long time, perhaps because of the appearance similar to Cecilia, Delisa couldn't help but reach out her hand.

"No, wait a minute!" Seeing Delissa's movements, Otto hurriedly tried to stop her, but it was too late.

As soon as Delissa touched each other's cheeks, the "boom" alarm sounded.

The walls that had been closer to black turned blood-red in an instant.

Like a puppet with a string on it, the blonde woman's figure floats in the air with her chest facing up.

"Ahhhhh

“#￥%……&&***@#$%”

A shrill voice spat out of the woman's mouth, and a long series of unexplained words came out.

"Eh, eh~ What is this? What's going on! ”

As if taken aback by this sudden move, Delissa looked around in a panic.

"Tsk~ Are you awake?"

With the white-haired mentally handicapped nun behind him, Otto was wary of the blonde woman in the ponytail in front of him.

"#¥%...... - Language System Correction Complete!"

The slender figure fell back to the ground, words spit out of her mouth without the slightest emotion. With just a few sentences of dialogue, she was able to completely simulate and deduce a language.

"The intruder will now be explained, this is [19..K23 Shelter]"

"I'm the guardian self-discipline unit in charge of this area [A1]"

"[19..K23 Containment Facility] preserves part of the template of [The Last Key to the World] that was destroyed by the Final Lawgiver"

During the whole process of speaking, the woman who called herself [A1] was calm and terrifying, and everything was still except her lips.

Covering the mouth of Teresa, who seemed to have questions, Otto knew that it was better to remain silent for now.

“……”

"Now, start mind-certifying the intruder"

As if it were some special ritual ritual, the woman placed her left hand on her chest and bowed slightly.

"Smack——!

It was like a heavy blow to the back of the head, and the brain was in severe pain.

Like a saw blade slithering through its head and rummaging through things, all the memories began to come back to me in my mind.

Whether it's yesterday's little things or those secret researches, even the memories of 500 years ago that didn't belong to this world have been rummaged through.

"It's, something! My memory? ”

Unlike Delissa, Otto is clearly in a more special position.

His brow furrowed, but [A1] still formulaically introduced, "[The Last Key to the World] is the ultimate means used by humans to fight against Honkai. Its power is so great that it is stored in this [19..k23 containment facility]......"

"And that's just part of it."

"But even if it's only partial. There are also very dangerous powers. Therefore, it must not fall into the wrong hands. ”

The dilated red pupils stared at Otto who was lying on the ground panting, and the girl who called herself [A1] was still unrelenting

"Will you use this power to protect something? Or, to plunder ......"

"Answer me, do you have the consciousness and conviction to match it?"

"Heh, since it's the last key, it's natural to exist to protect human beings, it's really a stupid question."

Weakly standing up from the ground, Otto smiled and looked at the woman in front of him.

Thanks to her, she seems to have remembered a lot of important things.

The answer is correct – but you still can't get rid of the shackles of personal feelings. I will not give you the last key to the world."

"Boom-"

A large number of black floating cannons floated from behind the blonde woman, an amount that could sieves the two in front of her in just a second.

"Warning! Now, get out of here! Otherwise, I will banish you! ”

"I'm sorry about that."

Taking out the pure white relic from the holster behind him, Otto aimed the muzzle of the gun at the woman in front of him.

“！！”

Her pupils suddenly constricted, and for the first time, the blonde woman showed emotion, "Put down the [Divine Key] in your hand, you don't deserve to hold it at all!" ”

"I refuse, my favorite thing to do in Otto is to say NO to an enemy who thinks he is victorious"

"The negotiation failed, and the target was changed to the enemy army!"

"Switch to combat mode, now start eliminating targets!"