Dragon Ball: I have the wrong system and I have entered the wrong world

"Okay, kids, let's start today's class." The middle-aged female teacher standing aside, looked at Trunks, Xiao Wu, Ash and Pilaf sitting on small benches, and spoke softly.

Obviously, these four children are in class at this moment.

"Oh my, teacher, please finish your lecture quickly and let us go out to play." Trunks could no longer contain his restless heart and interrupted impatiently.

"So, what is the parallel world all about?" Bulma, who was sitting next to him, blinked her beautiful big eyes and asked Jack with a puzzled look on her face.

"If you interfere with the timeline casually, it is very likely that a whole new world will be created, so this is a serious crime stipulated in galactic law." Jack explained solemnly.

"I heard from Taisi before that you seem to be researching some not-so-good things." Jake pointed at Taisi who was sitting next to him and still eating.

"Sister! Please stop talking about nonsense all the time!" Bulma yelled at Taisi unhappily.

"Don't worry, don't worry. Those are things that we need to consider long, long into the future. I don't care about them right now." Bulma waved her hand casually, acting very indifferent.

However, Jack keenly caught the flaw in Bulma's words just now. He frowned slightly and stared at Bulma sharply.

Bulma didn't seem to realize that her words had aroused Garke's suspicion, and she continued to speak as if nothing had happened.

"If the world remains peaceful, there will be no need to research [a time machine] if things continue like this. I am now mainly researching beauty technology."

"The future? Hey, why do you know about the future?" Jack suddenly raised his voice and asked Bulma loudly, with a hint of nervousness in his voice that was difficult to conceal.

Bulma was startled by Jake's sudden questioning, but quickly regained her composure. She turned her head away guiltily, not daring to look at Jake.

"Hey, um... why?" Bulma said very unnaturally.

Jack stared at Bulma closely, his eyes became sharper and sharper, and he became more and more convinced that Bulma must be hiding some important information.

"Even more suspicious." Jack muttered to himself.

"What? Why didn't you say anything when Hit used [Flash Time] to jump through time?" Bulma said loudly in dissatisfaction.

"Well, since what he does won't change what happened in the past, let it go." Jack explained helplessly, scratching his head.

"What? You are simply discriminating against us!" Bulma shouted at Jack relentlessly.

The movement on Bulma's side also attracted the attention of Taisi who was eating buns nearby.

"Hey, what are you talking about? Something like changing the past." Taisi put down the bun in her hand and asked in confusion.

"Well...if, so..." Jack began to stutter, hesitating for a long time without being able to make any clear words.

"You actually don't understand." Bulma said to Jack with a look of disdain.

At this moment, the words of a teacher attracted everyone's attention.

"Okay, let's start learning the new unit today. First, please turn to the first page of your textbook and read the first lesson, 'Knowledge about parallel worlds'."

After hearing what the tutor said, Bulma, Jack and Taisi all quieted down and turned their eyes over there.

"Let's assume there is a young boy named A here, and the time and space he is in is the present."

The tutor took out a little man with a smile on his face and pasted it in the center of the blackboard. At this time, the three words "past", "present" and "future" were clearly written on the blackboard.

"Isn't that me?" Trunks widened his eyes and looked at the little man pattern in surprise, because he found that the pattern was exactly the same as himself!

"Now, little A wants to give the delicious bean cake to his mother when he was a child to taste." The teacher then took out another bean cake pattern and carefully placed it next to the little man pattern.

"Bean cakes must be delicious." Xiao Wu, who was sitting behind Trunks, smiled mischievously and said to Trunks in a joking tone.

"Yeah, yeah..." Trunks responded somewhat helplessly.

"Hehe." Pilaf on the side couldn't help but cover his mouth and laugh.

"So, little A took a time machine to the past to find his mother when she was a child, wanting to share this delicious bean cake."

"However, things took an unexpected turn. When Xiao A handed the bean cake he brought to his mother when she was a child, something unfortunate happened - the bean cake got stuck in her throat, making it impossible for her to breathe, and she eventually choked to death."

As the tutor was talking, he quickly took out other small patterns and started playing with them, showing the four children the plots in the pictures.

Trunks watched the story in silence, his heart full of confusion, not understanding why the teacher had to use him as an example.

"If this happens, the normal development trajectory will be disrupted. Originally, Little A's mother should have fallen in love with Little A's father and given birth to Little A. But now, due to this unexpected incident, Little A in this world will not be born.

"At the same time, Little A in the original world will not disappear. This means that a small bean cake has changed the entire course of history and created a new parallel world where Little A does not exist."

The tutor continued to explain this complex concept in a simple and easy-to-understand way, but for this group of children, who were generally only eight or nine years old, these words were too profound. They listened in amazement and were completely confused.

At this moment, the tutor suddenly realized something and looked at the textbook in his hand in panic.

"Oops! I'm sorry, this is a textbook from the Good Kids Department of Wisdom University. I'm so sorry, hahaha." The tutor smiled awkwardly and said.

Then the teacher wrote another question: "So, what is 10-3 equal to?" she asked everyone.

"It's 7!" Pilaf raised his hand impatiently and answered loudly.

"Wow, you are worthy of being Lord Pilaf!" Ash exclaimed.

"Really? It's so rude to use someone else's photo to make up a story about their death." Bulma said with dissatisfaction as she looked at the teacher who came to tutor Trunks.