Faced with Fang Zheng's question, the girls looked at each other, speechless for a moment.

"Hmm? What's wrong?"

"No, how should I put it..."

Chiba Erica looked at the skateboard in front of her in embarrassment.

"This feels dangerous. Isn't there a better design? I feel like it will fall if I'm not careful..."

"Don't worry about that. I've already made preparations."

Fang Zheng understood Chiba Erica's worries, but unfortunately, strictly speaking, this was indeed the only solution at the moment.

The reason is very simple, because the basic principle of this universal flying magic is actually to use magic to suck a lot of air from the front, and then expel a lot of air from the back, so as to create an "airflow channel" in the air. Of course, if it is just the application of the principle itself, then magnetic levitation or gravity control is also an option, but the problem is that if it is modified like this, it will consume a lot of magic power, and it is still impossible for magicians with insufficient skills to use it.

This is the only way to fly and change direction through airflow that saves the most effort.

At least it's better than gravity manipulation.

In addition, the center of gravity is also a key part that needs to be controlled. The advantage of a skateboard is that the user only needs to control the center of gravity under the feet without having to adjust the direction of his or her center of gravity again.

Of course, if Fang Zheng wanted, he could also use other technologies to create similar flying props, but the problem was that those magics either had very high requirements for the user, or consumed a lot of magic power, or some simply required very high-end materials to manufacture.

These obviously have nothing to do with "general use".

"Then I'll demonstrate first, and you just watch from the side."

Fang Zheng understood the girls' caution and anxiety. After all, this was not like other magic, but flying magic. If something happened while flying in the sky, one would fall down and be crippled if not dead.

"Is this really okay?"

"No problem. In fact, I tried it before you guys got here."

Fang Zheng waved his hand, then stood up and walked out of the room. The four girls looked at each other and hurriedly followed him. Soon, they walked out of the warehouse and came to the lawn in front of the gate. Fang Zheng had already put the skateboard on the ground, adjusted it, and then stepped on it. Then he turned around and stared at them.

"Okay, let me show you... First, we need to step on the skateboard, and then inject the thoughts..."

As Fang Zheng spoke, the girls soon saw beams of light appearing on the skateboard. Seeing this, Kitayama Shizuku's silent face also showed a surprised expression.

"What kind of magic is this?"

"Fixing magic, this magic will connect me to the skateboard, so that I don't have to worry about falling off the skateboard... and then it's like this..."

"call--!!!"

As Fang Zheng was speaking, a jet sound was heard, and then the skateboard Fang Zheng was standing on shook a bit, and then, under the impact of the strong airflow, it left the ground and rose into the air.

"Just like flying a fighter plane, if you move your center of gravity forward, you will descend. Conversely, if you push your center of gravity backward, you will ascend. Also, be careful not to make the angle too large. Then continue to inject the seeds, and then you will accelerate..."

As Fang Zheng spoke, the skateboard began to move forward slowly, and the four girls followed subconsciously. At first, they walked beside Fang Zheng, and then began to jog, but soon, Fang Zheng sped up, and then with a fierce airflow whizzing past, the next moment he was riding the skateboard and flying into the sky.

“Wow——!!!”

Honoka Mitsui clasped her hands together in front of her chest, her eyes sparkling, while Erica Chiba and Mizuki Shibata also widened their eyes in surprise, staring at Fang Zheng who was flying into the sky.

“He really flew!”

No matter what, flying has always been the expectation and wish of mankind, and now seeing Fang Zheng flying into the air, the girls suddenly became excited. Even Kitayama Shizuku, who was usually taciturn, showed an excited expression at this moment, staring at Fang Zheng flying in the sky on a skateboard.

Fang Zheng's movements were just as he had told the girls before, swishing and gliding in the air like surfing. He turned a big circle, then suddenly dropped down, then slightly turned his body to the side and slid forward. In the girls' eyes, Fang Zheng at this moment was like a bird circling and flying in the air, fascinating.

After a while, Fang Zheng finally lowered his altitude again and landed steadily on the ground. At the same time, the girls ran over impatiently.

"I never thought this could actually fly!"

"That's amazing! Kasugano-san!!"

"Look, like I said, this thing is pretty simple, if you have experience with skateboarding or surfing, it will be easy to use."

Fang Zheng stepped off the skateboard and smiled at the girls.

"So, who's going to try?"

"Is there really no danger?"

At this moment, even the most cowardly and introverted Honoka Mitsui showed an eager expression, not to mention the others.

"I also made a safety device. Once the skateboard senses that it is losing control and falling, it will spray a large amount of air from the jets on both sides to slow down the falling speed, just like what happened just now, so that the user can regain control or land relatively safely. But if you ask me, I don't recommend beginners to fly too high, so as not to fall too badly."

"I want to try!"

Unexpectedly, the first person to speak was Kitayama Shizuku, who was usually the most taciturn and rarely showed any expression among the four people. At this moment, she was excited and her face was flushed, contrary to her usual expressionless look.

"I'm going to change my clothes now!"

After saying this, Kitayama Shizuku turned around and went back to the activity room, and the other three girls hurriedly followed.

Unlike Fang Zheng, they couldn't skateboard in their school uniforms. The reason was simple. The girls' uniforms at No. 1 High School were different from the uniforms in the worlds Fang Zheng often traveled through. They were not miniskirts or short skirts. Instead, they were a one-piece dress similar to a sleeveless cheongsam, with the hem extending to below the knees. This design was quite conservative. Although it didn't affect their daily movements, it was a different matter if they wanted to exercise.

This was also what made Fang Zheng most dissatisfied. You know, he usually counted on looking at the girls' skirts for a living, but the uniforms were designed so conservatively that he couldn't even see them...

And it's troublesome to take off.

Soon, the girls changed into sportswear and came back again, and Fang Zheng began to teach them how to use the flying skateboard.

The difficulty of flying a skateboard is not that high. It mainly involves maintaining body balance, keeping a stable center of gravity, and overcoming the fear of flying.

At the beginning, the girls were a little nervous, but Fang Zheng also told them to keep the flying height at two meters, so as to avoid falling. Then they started practicing with this height as the center, and then gradually increased the height to slowly adapt.

After the initial nervous period, the girls became addicted to it. They even skipped the next classes and kept flying in the air, as if they could never fly enough.

But unfortunately, humans have their limits after all.

Chiba Erica and Shibata Mitsuki from Section 2 ran out of magic power first and had to reluctantly return to the ground - after all, this was a machine powered by magic power, and without magic power they would have no choice but to fall from the sky and die.

Despite this, when the two returned the skateboard to Fang Zheng, they were reluctant to do so, and Shibata Mitsuki even looked like she was about to cry.

Honoka Mitsui and Shizuku Kitayama were able to hold out longer, but unfortunately they were not perpetual motion machines with infinite magic power. When Fang Zheng was sure that the magic power of the two was almost exhausted, he shouted at them to come down. Although they were somewhat reluctant, the two had no choice but to return to the ground.

In general, this experiment was very successful. In the girls' view, although the flying skateboard looks unreliable, they find it very reliable after getting used to it - just like a bicycle. At first, they always feel that a two-wheeled bicycle will flip over, but in fact, after getting used to it, they no longer feel afraid.

As for the battery life, Fang Zheng also conducted a test. Shibata Mitsuki and Chiba Erica, two students in the second department, could last about four to five hours at an average speed, while Mitsui Honoka and Kitayama Shizuku, who were top students in the first department, could last about seven to eight hours. Of course, considering that the guys in the latter were having a lot of fun and wasted a lot of magic power meaninglessly, perhaps the time could be extended again.

As of now, the consumption of magic power has been suppressed to a very low level, but for Fang Zheng, the more experimental samples the better.

Well, it’s about time to get Nanakusa Mayumi and the others over to give it a try.

So naturally, Fang Zheng set his sights on his colleagues in the Student Union.

"Kasugano."

Just when Fang Zheng was thinking about how to trick Nanakusa Mayumi and the others... no, invite them over, he saw Kitayama Shizuku coming in front of him.

"Hey, Beishan, it's rare that you would take the initiative to look for me. What's the matter?"

Looking at Kitayama Shizuku in front of him, Fang Zheng asked curiously. This short-haired girl also has a very cute face, but unlike Mitsui Honoka, she gives people a feeling of being a little cold and indifferent. Her voice rarely fluctuates when she speaks, and her expression is also very indifferent. Most of the time, she is more like a bystander, and it seems that she is not very active in most things. The reason why Kitayama Shizuku joined here seems to be simply because Mitsui Honoka wants to join. Although she has also benefited a lot from Fang Zheng's teaching, the relationship between the two can only be said to be relatively good.

Shibata Mitsuki and Chiba Erica are more likely to take the initiative to chat with me, but Kitayama Shizuku is rare.

"Yes."

Kitayama Shizuku nodded.

"Now that you have mastered the technique of generalizing flight, what are you going to do next?"

"You should have thought of it."

In response to Kitayama Shizuku's question, Fang Zheng chuckled.

"It's just right. If you don't come to find me, I will also go to find you... You should understand what I mean."

"certainly."

Kitayama Shizuku nodded again, and this time, her eyes sparkled with a lively light.

"The Kitayama Foundation hopes to cooperate with you to jointly develop a flying skateboard, Kasugano-san."