The Second Dimensional Shuttle of Problem Children

Kana and Izayoi suddenly looked towards the sea.

「…………！」

He stared at the sea in silence.

As if he was looking for something.

Kana's face turned extremely pale.

Izayoi had just met him, but it was the first time he saw him. Kana was so shaken.——

「……"Kana?"

Izayoi called out from the side, but Kana ignored him.

She was like being nailed by the sea.

「——"Kinji... run away!"

Kana... shouted.

This in itself was unbelievable to him.

What's wrong with you?

What's wrong with you, Kana?

You actually yelled at me in this voice, and you actually panicked like this.

This kind of thing has never happened in the life you and I have lived together!

Kana ignored Toyama's words and continued

「"Run away, Kinji! Get out of here!"

Kana grabbed Toyama's sleeve and swung it, causing him to break out in a cold sweat."

Wait! Wait! Kana! You want us to retreat, but we don't even have a boat."

Izayoi interrupted."

Kana, that's the confusion that can't even be distinguished.

That Kana. Even Petra is no match for Kana." She panicked.

「Little... Little Jin……！」

The one who realized the change was Riko.

「"Iyou is coming!"

Riko said beside him.

He knelt down on the spot with fear all over his body.

Looking at the clear sky and sea behind Riko from the distant mountains - he found something unusual.

The sea - was very unusual.

There were groups of whales before, but now there is not even a single one.

No, not only that. There is no trace of birds or fish.

It's just like - the animals on the savannah sensed the approach of the king of beasts and all ran away.——

「Ah…ahhh……！」

Kana covered her mouth with her hands to prevent herself from screaming.

Sha…

Sha… Sha…

The vibration was like an earthquake at sea.

The entire Amberil was shaking.

No, the entire sea was shaking.……！

「——"That's Kinji!"

Aria, who was always brave in an emergency, ran to the tip of the ship and pointed at the sea.

Toyama also ran to Aria's side.

The sea surface that Aria pointed at, a few hundred meters in front of the Umberil, bulged.

The sea was lifted up.

——This - how is it possible!

Crash, splash, splash, splash, splash, splash, splash, splash, splash, splash, splash!!!

In the water that was cascading down like a waterfall, what gradually emerged under the midsummer sun was - not - a whale.

It was not that tiny at all. A gigantic black metal object that was ten times larger than a 30-meter-long adult white fin whale floated up!

The waves caused the Amberil to sway like a fallen leaf.

Toyama and Aria grabbed the chains on the bow, trying not to fall off.

The huge object that was like a wall shining with black light - in front of the Amberil, it became bigger and bigger, and it came closer.

It was like seeing a high-rise building from a distance, something that was so huge that it was impossible to see the whole picture.

But, there was no mistake, it was man-made.

What Izayoi saw was the two huge characters"伊U" painted on the giant body, each of which was as big as two meters, passing by in front of his eyes.

The white"伊U" that passed leisurely in front of his eyes』『U』The two characters reminded Izayoi of something. He had seen them in the supplementary materials for his history textbooks before.

——That was the code word used by Japan to refer to submarines.

U．——

This is also the code name of submarines used by Dé country.·UI-You's true form is this, a submarine!

The Amberil turned around and saw the belly of the ship. This ship type over 300 meters in length - I know it.

Although I don't know much about submarines... but I have seen this ship before.

「Vostok……！」

Later, Izayoi remembered that it was the model that Muto had played with in the swimming pool some time ago, the largest nuclear submarine in history.

「……You, saw it……」

Kana, lying on the deck of the Amberil, said

「That's right. This is the strategic nuclear missile carrying submarine that was once called Vostok. Vostok did sink. It was stolen. By the most intelligent mind in history, Professor』……」

The nuclear submarine stopped after turning the rudder. A man appeared on the bridge.

Kana stood up and shouted.

「『professor』……Please stop! Don't fight these kids!"

Tap! Kana rushed over and stood further forward on the bow as if to protect us.

Whoosh!

Silence. No sound.

And Izayoi stood directly next to Kana, stretched out his right hand, and said as if holding something.

——A gunshot rang out like distant thunder.

「"Kana! Do you all like sneak attacks?""

Blood——!"

Izayoi said to the man standing on the East after throwing away the bullet.

The man didn't seem to have made any moves, but shot Kana from that distance.

——『Invisible Bullet』——Did he use Kana's skill with a sniper rifle?!

Izayoi observed the man in front of him.

「…………！」

A slender, lean body.

Hooked nose, strong chin.

In his right hand he holds an old-fashioned pipe - in his left hand, he has a cane.

He doesn't wear a top hat like in the photo or the picture in the detective textbook... but at this point, there's no doubt that it's a hologram or someone else who just happened to look like him.

He is the leader of the I-Yu, the 'Professor'.

Seeing that person who somehow looks like he's only in his twenties - Aria, she screamed hoarsely -

「……Great-great-grandfather……！？」

That's right, that's Aria's great-grandfather.

Sherlock Holmes the First!