Doraemon: I have a book of Kuro's magic

After shrinking the whale using the [Shrinking Light], Doraemon took out another prop [Restore Light].

The damaged roof that was smashed by the huge whale has also been repaired. Otherwise, if their mother discovers it, the two of them will be miserable.

Nobita breathed a sigh of relief after seeing the completely repaired roof.

Because the whale has now completely shrunk, Nobita can finally see clearly what the huge thing was just now.

"It turns out that thing just now was a whale. It turned out to be so cute when it became smaller!"

I didn’t expect that little whales are quite cute.

"If that's the case, let's use this [Pet Fish Bait] first!" Doraemon took out another prop from his four-dimensional treasure bag, but this time the prop was indeed a whale. Enjoy the food.

"Nobita, take out a handful of bait from here and throw it to the whale to eat!"

"Hey, is that so?" Nobita curiously stretched out a hand and took out a handful of fish bait from the [Fish Bait for Pets].

He threw the bait directly in the direction of the whale. As if the whale felt the scent of food, it immediately opened its mouth and took the bait straight into its mouth.

Then, for some reason, the whale suddenly emitted a ray of light, and then slowly floated into the air, drifting towards Nobita.

Nobita: "???" It's so amazing, what on earth is going on?

"Why did it suddenly float?" When the whale helped him up, he floated to the direction of Nobita and kept supporting Nobita with his cheek.

"Okay, it's really itchy. Please spare me!"

"This way, you can take it with you wherever you go."

"It's quite convenient to look at it this way!" Nobita soon began to tease the whale that had been beside him.

Doraemon: "..."

Alas, after Doraemon sighed, he immediately stuck his head into the [Indoor Fishing Pond], wanting to know what was going on and why the whales suddenly attracted him.

After just observing for a long time, he didn't gain anything. Instead, he found that there were no fish around.

It's no wonder why they didn't catch a fish even after fishing for a long time.

"What the hell is going on?" Doraemon murmured, "Although it looks very much like a blue whale from the outside, why is it in this kind of place?"

After thinking for a long time, Doraemon didn't figure it out. Instead, he found that the surroundings were very quiet. When he turned his head, he realized that Nobita and the whale had disappeared.

Doraemon: "..."

I don’t even want to know where Nobita has gone.

Doraemon stood up from the tatami helplessly and complained: "Nobita, this guy is so serious, he actually went to show off right away!"

"Huh?" Didn't this ocarina hero take him away?

Doraemon stepped forward, slowly picked up the ocarina, and took a look at it.

"Maybe...this ocarina..."

Doraemon seems to have discovered something here...

……

On the other side, Nobita made a phone call and called out everyone, saying that he had something good to tell him.

The people in the open space were very surprised after discovering the good thing Nobita mentioned.

Especially, Fat Tiger, Shizuka, Xiaofu and Dekisugi Hideai.

"How about it!" Nobita said showing off for him, "You know this is not fake, this is a real whale!"

"Originally he was this big at first." Nobita made a very exaggerated gesture, "Later, with the help of Doraemon's props, his figure became smaller!"

The whale seemed to be cooperating with Nobita and made a cry.

"So cute!" Shizuka thought this whale was just too cute, especially when it screamed just now.

Although the husband's face was surprised at first, he soon said disdainfully: "Humph, it's not a big deal, it's the Doraemon test again anyway!"

I don’t know whether it was because he was unwilling or jealous that Xiaofu mocked Nobita there.

"Anyway, it's obvious that you can't accomplish anything by yourself just relying on Nobita..."

When he said this, the whale suddenly sprayed out a pipe of water and shot the boy down.

It was obvious that the whale was obviously protecting Nobita.

Xiaofu could only say that he deserved it. Whoever left him with nothing to do would have ridiculed Nobita.

Young husband: "..."

The husband, who was suddenly sprayed with water, stood there in confusion.

After Fat Tiger saw this scene, he couldn't help laughing.

Hanyu Chuhuo, Xiao Ke and [Zoroark] lowered their heads and complained: "You deserve it!"

Perhaps because he was confused, the husband was not angry. Instead, he took out his handkerchief and kept putting it on his body.

Cen Feng was afraid that his husband might catch a cold, so he kindly dried his lower abdomen and body.

"Thank you!" Xiaofu was naturally very grateful for this.

At this moment, Doraemon ran over anxiously and said, "Nobita!"

"Doraemon?" Nobita looked at the panicked Doraemon and asked, "What's wrong? Why are you so anxious?"

Doraemon said: "This is a serious matter. This whale must be no ordinary whale!"

Nobita: "!!!" What do you mean by not being an ordinary whale!

Is it possible that there are unusual whales in this world?

……

After Doraemon's explanation, everyone finally understood what happened.

"So this whale was attracted by the ocarina?" Dekisugi Hidecai was very curious now. He wanted to know why the ocarina could attract such a whale.

Of course, I also know that now is not the time to be curious, so I put this question in my mind for the time being.

"Yes!" Doraemon said, "After I discovered this possibility, I tried to conduct various investigations on this ocarina."

"Then I learned from the investigation that the flute would emit a special sound wave when it was picked up."

"Sound wave?" What is it?

Nobita obviously doesn't understand what sound waves are.

"Can it be understood as a wave that transmits sound?" Cen Feng gave an easy-to-understand explanation.

"Oh, that's what it means!"

When he said this, Doraemon's expression became tense.

"According to my investigation, I found that the frequency of this fundamental n-wave actually reached 52 Hz."

"Hertz?" What is this?

This time it was our Fat Tiger who expressed doubts.

The person who explained it was our Dekisugi Hidetaka: "Hertz is a unit that represents pitch."

"Oh!" Fat Tiger nodded, indicating that he already understood.

"You said there is 52 Hertz?" Xiaofu said, "This may be related to the loneliest whale in the world."

"That's right, that's what I'm talking about!" Doraemon didn't know why, but he suddenly became excited again, and it was also because of the sudden explosion that he was shocked by the little husband.

Xiaofu: "..." I don't seem to have provoked you, right? Why did you suddenly break out in such a scary way?

"My loneliest whale in the world?" Nobita asked, "What is that?"

Is there actually the loneliest whale in the world? This was the first time he had heard of this.

The husband chuckled, stood up and explained.

"You know that even if whales are far apart, they can communicate with each other through their calls!"

Nobita and Fat Tiger both shook their heads, saying they didn't know.

Xiaofu didn't care, because they were the only ones who didn't know that he could still show off his erudite knowledge.

"Generally, baleen whales basically communicate by emitting sounds below 20 Hz."

"But there was one particularly special whale that had a unique call."

“I don’t know why the frequency is emitted, but it’s actually as high as 52 Hz!”

"It is for this reason that this whale is unable to communicate with other whales."

"In the nearly 30 years since it was discovered, it can be said that it has been chirping alone and constantly traveling back and forth through the sea."

"It is precisely because of this appearance that this whale is called [the loneliest whale in the world]."

After hearing the result, Nobita showed a shocked look on his face.

In order to confirm again, Doraemon took out a prop and tested it, and found that, as he thought, the sound made by this whale indeed reached 52 Hz.

This also shows that his previous guess was not wrong.

"By the way, is this child the loneliest whale in the world?" Shizuka asked, pointing to the whale.

"Maybe it's like this!" Doraemon said, "The reason why this whale was attracted by the big bear is that it probably mistook the sound of the ocarina for the cry of its companion, and then chased after it."

"Is it true?" Fat Tiger said, "If it is really like this, this is simply the great discovery of the century!"

"Do you think this is the end? In fact, there are even more surprises!"

After taking everyone back to Big Bear's room, they took an extra book and did something even more shocking.

……

"What did you say, 7000 years!"

"That's right!" Doraemon said, "I have tested it several times, and this one was made 7000 years ago."