*Boooom!*

The speed that Luan and Cristina flew in the flying cloud surpassed the speed of sound as they traveled through the air. Upon reaching such speed, they ran over the sound waves generated by themselves. The effect was a big shock wave, which caused a big bang.

Sound travels through waves, using air as a propagation medium. Such waves, called "pressure waves", develop in the same way as when we throw a rock into a lake: a circular wave forms at the point where the rock hits the lake and moves away, expanding at a constant speed.

If we throw several stones at the same point at regular intervals, we will form concentric waves – this is what happens with a sound emitter such as an airplane. The propagation speed of these waves is what we call the speed of sound.

At sea level, under standard atmosphere conditions, this speed is 1,226 km/h, and decreases with the drop in air temperature. Thus, it was agreed that when an airplane moves at a speed equal to that of sound, it is flying at "Mach 1". 

As Luan continued to accelerate beyond the speed of sound, he was leaving behind the pressure waves he produced. At that moment, Luan, along with Cristina, reached supersonic velocity, his acceleration allowing a quick passage through the speed of Mach 1, avoiding the formation of the Sonic Barrier.

In turn, when air in supersonic flow is compressed, its pressure and density increase, forming a shock wave. In supersonic flight, with speeds above Mach 1, Luan created a dome, but pointed at the front, around himself and Cristina, it produced numerous shock waves, being more intense than those originating in front of them. The shock waves generated by them in supersonic flight would hit the ground after their passage that was producing them, as they were traveling faster.

"Wow!"

"What was that?"

Some observers on the ground heard a loud bang as the shock waves reached them. This bang was known as sonic boom, and its intensity depended on several factors, such as the dimensions of the cloud created by Luan and the dome that surrounded them, shape, flight speed and altitude. This phenomenon could, under certain circumstances, be strong enough to produce material damage to the ground, such as broken glass, cracks in walls, walls and other damage. Because of that, Luan chose to fly above the clouds.

"This is too fast!" Cristina was feeling dizzy. She barely noticed anything, and when she did, she was already in a totally different place, passing through seas, lands, waterfalls, etc.

Fifteen minutes, just fifteen minutes and they reached Hokkaido, Japan!

Their speed slowed down. From the air, they saw a giant naked woman. She had dark skin and pink hair. A huge uproar was taking place; this giant was breaking up an entire village that was occupied by the Zon Family.

"Is this my aunt?" Cristina asked in disbelief. On the way Luan had already described her characteristics, but seeing her in person was something else.

"Yeah." Luan nodded.

"Who is she attacking? In fact, there are even military helicopters and armed men shooting at her. Will she be okay?" Cristina asked with a tone of concern.

"She is incredibly strong. She is very close to the Third Order after unlocking the Titan Origin. And as it is not a common Origin, she has a much stronger body than normal. If it weren't for the technique I train, she would have a body even stronger than mine," Luan told her.

"This sounds amazing, but let's help her, yeah?" Cristina didn't want to keep watching this scene unfold.

"Of course," Luan nodded.

In the next instant, clouds appeared below Chloe Santos' feet and she began to float. When she tried to struggle, more clouds began to surround her and trapped her.

"I'm not an enemy, stay calm." Luan's voice echoed in her ear. Chloe looked like she was mesmerized. She somehow calmed down when she heard his voice and looked in the direction where Luan and Cristina were.

"Luan Dimas?"

"What the hell is he doing in Japan?"

"This bastard, does he think he can come and go from our country as he pleases?"

Some of Japan's top echelons saw this scene via live video. They were very angry, as they knew Chloe was different from the monsters. She was a human being; it would be easier to control her if they discovered her weak point, but now, seeing Luan appear and wanting to take her away, it made them furious.

"Stop him!" Someone high up called the men present at the scene and they were armed.

"Yes!"

"Don't let them get away!"

Luan didn't show fear. He even dared to stay in place, and his voice echoed, "Oh, are you all sure you can go against me? By the way, this woman is a native Brazilian who was captured and made to be a laboratory rat. Yet, you still want to stop me from taking her back. Are you sure about that?"

Luan's voice was calm. He spoke naturally, without showing his emotions, but the sense of danger increased. Something inside his words said that the moment they made a move towards him, it would be the end of them.

"Luan Dimas managed to clean up the whole of Brazil practically on his own..."

"Yes, he is strong enough to handle these monsters, and even this giant woman was captured by him so easily!"

"Is it a good choice to make him an enemy?"

The top brass knew that, but how would they be able to save face later if they let Luan do what he wanted and walk away just like that?

Seeing that they weren't convinced, Luan looked at a certain spot, and then a pure white ball spun in his hand. The sense of danger only increased when they saw it, and when they heard his voice, they shit themselves in fear. "This family doesn't need to exist anymore!"

*BOOOOOOOOOOOOOM!*

The description of the scene before everyone's eyes was beyond words... As the spinning cue ball came out, a shrill sound echoed and the cue ball landed in the Zon Family village.

*Booooooooooom!*

The first explosion was followed by another explosion, and a sequence of explosions followed. It didn't look like Luan threw a single ball of white energy, but several.

"How is it? Do you still want to stop me?" Luan's expression didn't change. He looked at the helicopters and jets, battle tanks, etc., undaunted.

"W-We don't dare!" The man in charge said while stammering.

"Well! I'm leaving now," Luan said, but before leaving he did not forget to warn them, "Oh yes, if you want to seek revenge, you are welcome, but know that if you do that, you will be banned from Online Survival."

The importance of the game only increased after the apocalypse began. People who got stronger thanks to the game, managed to fight more easily against monsters, even using firearms, and could use agility and strength to find the weak points and defeat the monsters.

Honestly, if it wasn't because Japan was going through a crisis with monsters everywhere, they would have loved to start a war against him right there. But after hearing Luan's threat, they started to think better.

If the country lost the right to use this game, it would be the same as losing part of its forces. And possibly they would be dominated by other countries in the future if they could even survive if these monsters continued to appear. When most of them thought about it, they sweated with fear.

Seeing the strength of Luan Dimas, it was possible that he had more things hidden than the eyes could see. It was possible that soon he would update the game and give players more rights, which would be even more regrettable if they couldn't get into the game. And as pitiful as it was, they tried to replicate the game but failed, so they determined that Luan or whoever made this game was a genius without equal.

After they walked away, Chloe, who saw the Zon family being destroyed, soothed even more. Her emotions then overflowed and she cried. All the pain and suffering she had had to endure in that damn place passed before her eyes. Her body seemed to have relaxed, and the sounds of bones cracking echoed. Seconds later, her body returned to normal human form, but then, an excruciating pain overtook her.

"Ahhhh!"

Luan approached, and placed a hand on her shoulder, intending to heal her.

Chloe looked at him warily, until she spotted Cristina up close and muttered in pain and surprise at what she saw. "Urgh! Gabriela?"

-

Fun fact: the sound of a whip cracking is actually a supersonic boom! That's because the tip of the instrument can be faster than the speed of sound (the whip was man's first invention to have this incredible ability).