On the street in the early morning, two vigorous figures were running at extreme speed, and the speed of these two figures had exceeded the limit of ordinary people, turning into two dazzling shadows.

Where the black shadow passed, a strong wind hung by, blowing the windows of the buildings on both sides, like a typhoon passing through.

The two young men with strange metal rings on their hands and feet, their feet were like the wind, and their speed was gradually approaching the speed of sound, and ordinary people could only see a dazzling shadow passing by.

These two people are Kita-Ray and Saitama.

A year and a half has passed unconsciously, and it has been a long time since Bei Ying Lei came to the world of "One Punch Man", and he has gradually integrated into this world.

In the past year and a half, Bei Ying Lei has never relaxed the training of his body, and now even he himself does not know how much strength he has now, but it is a pity that the "charging crystal" in his dantian is still devouring his internal strength.

In a year and a half, it was not the Northern Thunder that changed the most, but Saitama.

Ever since discovering that the Northern Thunderbolt had begun to exercise desperately, Saitama seemed to have been stimulated, and he also joined the training program of the Northern Thunderbolt, and slowly accepted the teachings of the Northern Thunderbolt to guide the superhuman strength in his body.

The ten-kilometer morning run, which ended quickly at the top speed of the two men, came to a halt when they reached an open and unoccupied place.

"Today is a second faster than yesterday!" Saitama looked at the chronograph on his wrist and said excitedly.

Bei Ying Lei stretched his muscles and bones for a moment before he said, "It seems that we are already familiar with fifty tons of binding force!"

Saitama pointed to a metal belt around his waist, nodded and asked, "Do you want to continue to increase the restraint?"

"No!" Bei Ying Lei shook his head and said, "Electromagnetic restraint is useless to us!"

The metal belts around the waists of Kitastylei and Saitama and the metal accessories on their hands and feet are the "electromagnetic restraint belts" that Bofoyi has tailored for them for a year and a half.

The belt around their waist creates an electromagnetic field that attracts the metal rings on their hands and feet, and in order for them to move freely, they must exercise while adapting to the electromagnetic binding force.

The principle of the "electromagnetic belt" is to increase the external force restraint when the two of them exercise, and play the role of weight-bearing exercise in disguise.

To say that Bofoyi is indeed a genius, Bei Ying Lei just put forward the "electromagnetic bondage theory" mentioned in the manga in his previous life, and he can turn it into reality and do it better.

The maximum binding force of the "electromagnetic belt" is fifty tons, which means that the two of them have to overcome the external force of fifty tons while maintaining a speed close to the speed of sound, and if the binding belt is removed, their speed may be even more terrifying.

It's a pity that the maximum binding force of the "bondage belt" is only fifty tons, and now the two who have gradually adapted to the bondage force can no longer improve their strength.

Bei Ying Lei took off the restraint belt, and suddenly felt that his body was light, and the power of his whole body poured out endlessly, and he was more than 100 meters high with a light jump.

Saitama on the side was the same, but he used too much force, and his body was extremely high, jumping directly to a height of a thousand meters before starting to fall back.

bang

Saitama slammed to the ground, cracking the hard earth like a spider's web, but he stood up casually, patted the dust off his body, and continued to play.

As soon as the Northern Darkness got used to the strength of his body, he stopped, resting while perceiving Saitama's body with his Genshin.

The more he came into contact with Saitama, the more he felt Saitama's horror.

At the beginning of the exercise, Saitama did not show too much strength, after receiving the guidance of the Northern Stygian Thunder, every day tired like a dead dog, can pass day by day, Saitama persevered, and became stronger and stronger, gradually catching up with the Northern Stygian Thunder himself.

A year and a half later, Saitama's physical strength has exceeded a thousand tons, and he can easily cause a ten-level typhoon with one punch, or even stronger, if it weren't for how to use his own power by the Northern Thunderbolt, I'm afraid that Z City would have been destroyed by him a long time ago.

After watching Saitama get used to his strength a little bit, Kita-Stygian suddenly burst out and punched Saitama in the right shoulder.

At this time, the speed of the Northern Thunder had long exceeded the speed of sound, but his body seemed to melt into the air, merging with heaven and earth, and did not produce a sonic boom.

rumble

A simmering thunder exploded, and Kitasty Lei's fist was caught by Saitama's right palm, and the strong wind caused by the two fighting each other blew everything around them away, creating an open space within a hundred meters.

"Has the actual combat training begun?!" Saitama smiled excitedly.

After every day after the workout, the North Stygian Thunder will fight with Saitama once, on the one hand, let him vent his body's strength and control his ability in disguise, and on the other hand, the Northern Stygian Thunder must always observe the progress of Saitama's strength growth.

For Saitama, there is nothing more comfortable than a hearty battle.

Boom, boom, boom

The strength of the two fights directly turns the surrounding kilometer into a dead field, but whenever a creature breaks into their battlefield, it will be shattered by the violent energy in an instant.

Saitama wantonly vented the power in his body, and he could exert a thousand tons of power with one punch and kick, and the North Stygian Thunder was not to be outdone, and he had a hard encounter with Saitama, fist to fist.

bang

When the two fists met, the air exploded with amazing force, and the two flaming fists were like nuclear bombs, creating a whirlwind within five kilometers and rolling everything up to the sky.

In terms of strength, the two are evenly matched, but in terms of skills, the Northern Thunder is slightly superior.

"Double strength!"

The fist strength of the Northern Thunder has not subsided, and it has risen again and again, and the strength is hidden, directly shaking Saitama into the air, but Saitama's body defense is more than attack power, and he is not injured.

"How many times have I told you, you have to learn to concentrate the strength of your whole body, not just the strength of your arms!" The Northern Thunder attacked while instructing.

Saitama is like a sponge, quickly absorbing the martial arts experience of the Northern Thunder, and his control over his own power is getting stronger and stronger, and the lethality caused by it is getting stronger and stronger.

Gradually, the North Stygian Thunder was also a little difficult to deal with, and the two fought more than a hundred moves, and the Northern Stygian Thunder was not hit by Saitama until the last punch.

Saitama's waist sank, and the force rose from the ground, and the full strength was pulled by the power of the waist and abdomen and brought into a punch.

The Northern Thunder can't describe Saitama's punch, his punch is silent, but it is like heaven and earth invading, it seems unpleasant, but in fact it exceeds five times the speed of sound.

brush

When the Northern Thunder heard the sound, Saitama's fist had already hit him, and the thousand tons of divine power were concentrated in one point to burst, exerting several times the power.

Saitama strictly followed the teachings of the Northern Thunderbolt and threw all his power on his master's body.

rumble

The body of the North Thunder smashed into a rocky mountain not far away faster than the cannonball, and was smashed into the belly of the mountain with a "boom", and the mountain began to collapse and collapse between the smoke and dust, and the North Thunder was deeply buried in the rubble.

After Saitama's punch, he also had to breathe back slightly, but he believed that his punch did not hurt the Northern Thunder.

Sure enough, I heard a loud noise not far away, the ground shook and the mountains shook, and a figure flew out of the rubble, except for a little dust on his body, the North Thunder was not even injured at all.

Seeing the appearance of the Northern Thunder, Saitama said discouragedly: "I still can't surpass the teacher!"