System Upgrade

"Shall we get started?"

Son Goku said.

Son Gohan nodded.

Seeing this, Son Goku immediately shouted and charged at Son Gohan.

"Whoosh..."

"Swish, swish..."

Son Goku quickly reached Son Gohan and attacked him with lightning-fast punches, but Son Gohan dodged them all.

Son Goku gritted his teeth and threw both fists forward with all his strength.

Son Gohan dodged to the side and drove his right knee hard into Son Goku's stomach.

Son Goku let out a loud cry of pain, and a mouthful of spit immediately flew from his mouth.

Then Son Gohan clenched his right fist and slammed it into Son Goku's face.

Son Goku's body immediately flew backward.

Son Goku clenched both fists and quickly stopped himself in midair, then wiped the scrape on his face.

Immediately afterward, he clenched both fists tightly.

"Ha!"

With a loud shout, Son Goku transformed into a Super Saiyan.

"Whoosh..."

After transforming, Son Goku flashed forward and quickly appeared in front of Son Gohan, attacking with both fists.

"Whoosh..."

Bang, bang, bang!!

Son Gohan raised his fists and fought with Son Goku.

A series of powerful gusts soon swept across the sky.

"Ha!"

After they had fought for a while, Son Goku suddenly shouted and kicked forward with all his strength.

Son Gohan dodged to the side, grabbed Son Goku's right leg with his left hand, and flung him outward. Son Goku's body went flying with it.

"Ah!"

Son Goku yelled, quickly coming to a stop in midair.

At that moment, Son Gohan suddenly appeared behind Son Gohan and struck him with a flying kick, sending Son Goku crashing to the ground.

With a thunderous boom, a huge cloud of dust erupted from the ground.

"Whoosh..."

Just then, a figure suddenly appeared behind Son Gohan and threw a punch with all his strength.

It was Son Goku.

"Instant Transmission?"

Trunks was startled.

"Whoosh..."

As soon as he finished speaking, Son Goku's right fist passed straight through "Son Gohan's" body.

"Uh-oh!"

Son Goku seemed to sense something. He suddenly spun around at high speed.

Then Son Goku saw a small fist coming straight at him.

The distance was so short that Son Goku was sent flying straight into the mountain behind him.

Seeing this, Piccolo couldn't help frowning.

He had originally wanted to fight Son Gohan himself... but judging by the situation, if he really fought Son Gohan, he would probably be defeated in an instant.

A while later, once the dust had settled, Son Goku gasped for breath as he slowly climbed out of the mountain.

"Gohan, you're unbelievably strong now. Even after turning into a Super Saiyan, I'm still no match for you!"

Son Gohan nodded.

"Dad, how about you, Trunks, and Uncle Piccolo all take me on together?"

"Together? You mean the three of us should fight you at the same time?"

"Mm-hmm!"

Son Gohan nodded.

"Piccolo, Trunks!"

Son Goku looked at the two of them.

"I'm fine with it!"

Trunks said solemnly.

"I'm fine with it too!"

Piccolo didn't really want to fight Son Gohan, but he couldn't let Son Goku and the others know that he was scared.

"Then it's settled. The three of us will take him on together!"

"Mm-hmm!"

Trunks nodded.

With that, the three of them charged into the sky together.

They quickly reached Son Gohan and attacked him with their fists.

"Whoosh..."

"Swish, swish..."

Bang, bang, bang!!

Son Gohan dodged while attacking the three of them.

Bang!!

A while later, Son Gohan clenched his right fist and punched Piccolo, sending him flying.

Seeing this, Trunks immediately transformed into a Super Saiyan and fought Son Gohan.

After a long while, Son Gohan defeated all three of them in his normal state.

That made the three of them fully understand the difference between themselves and Son Gohan.

Trunks: "Gohan, we lost!"

"It's okay, Trunks. As long as you train hard, you can become as strong as me someday!"

"Mm-hmm!"

Trunks nodded.

Three days passed in the blink of an eye.

As usual, Son Gohan was training with Trunks on Mount Paozu today.

"Ding! System upgrade successful. New feature added: walking increases battle power!"

"Walking?"

"That's right, Master. This means you can now increase your battle power just by walking!"

"Can I increase it by sleeping?"

"...I'm afraid not!"

"How much battle power do I gain by walking?"

"Under normal gravity, Master gains 10 battle power with each step. In a 100-times-gravity chamber, you'll gain 100 battle power per step. At 500 times gravity, that amount is multiplied by five!"

"What about running?"

"Of course! Running is also calculated by the number of steps you take. Also, Master now gains 20 battle power from doing one ordinary one-finger push-up!"

"20!"

"That's double what you used to gain. If you train under 800 times gravity, one one-finger push-up will increase your battle power by about 1,600! If you do 10,000 of them, that's 16 million!"

"16 million!"

"That's right, Master!"

"Looks like I'll have to ask Bulma to upgrade the Gravity Chamber for me!"

"What's wrong, Gohan?"

Seeing Son Gohan standing there in a daze, Trunks asked him.

"Nothing! I just suddenly realized the gravity in this chamber is too light. I need to increase it!"

"..."

Hearing this, Trunks fell silent.

A 500-times-gravity chamber really was too light for Son Gohan, but... for him, it was already unbearably heavy.

The next morning.

Son Gohan went to Bulma's house first thing in the morning and asked her to upgrade the Gravity Chamber.

After hearing him out, Bulma looked reluctant.

"Gohan, you want me to upgrade your Gravity Chamber again?"

"Yeah! Please, Aunt Bulma!"

Bulma wasn't very keen on upgrading the Gravity Chamber for Son Gohan, but seeing him ask so earnestly, she didn't feel like refusing and agreed.

"All right, but this time I'll increase the gravity to 800 times. You can't come asking me again for three years—no, five years!"

"Okay, Aunt Bulma!"

Son Gohan smiled.

"Then give me the Gravity Chamber."

Son Gohan immediately handed Bulma the Hoi-Poi Capsule containing the Gravity Chamber.

"Then how long will it take you to upgrade it to 800 times gravity, Aunt Bulma?"

"I'm not sure. I'll call you when it's ready!"

Son Gohan nodded.

"Sorry for the trouble, Aunt Bulma!"

Bulma nodded.

Seeing this, Son Gohan immediately left Bulma's house.

Just then, a loud explosion suddenly came from the Gravity Chamber where Vegeta was training.

"That guy's at it again!"

Bulma looked helplessly toward Vegeta's Gravity Chamber.

Ever since Vegeta learned about the Androids, he had been training in the Gravity Chamber like a madman, often causing quite a few explosions in there.

Several times, Vegeta had nearly blown himself up.