Starting from Naruto: The Invincible Road of the Slacking Girl

After finishing her meal, Bulma put down her cutlery, her expression gradually becoming serious.

She took a deep breath, her gaze sweeping over Yu Xi, Trunks, and Gohan before finally settling on Yu Xi's face.

“Miss Yu Xi, I have a question to ask.” Bulma said seriously.

Yu Xi put down her water glass and nodded slightly: "Please go ahead."

Bulma paused for a moment, seemingly organizing her thoughts, before slowly speaking: "If the past and the future both exist, I've come up with a plan. I want Trunks to take the medicine to treat toxic heart disease and save the past Sun Jun."

As soon as she finished speaking, Trunks and Gohan froze, their eyes turning to Bulma.

A complex emotion flashed in Bulma's eyes: "I don't want to see our story repeated in another world. Sun Jun's death... that tragedy could have been avoided. If we could change the past, perhaps we could save countless lives, or even change the fate of the entire universe."

Gohan's expression also turned serious. He said in a low voice, "Aunt Bulma, do you mean... we can influence the future by changing the past?"

Bulma didn't answer directly, but continued, "I'm building a time machine, and it'll be finished soon. As long as Trunks goes back in time with the medicine and gives it to Goku before he has a heart attack, he can be saved."

Trunks asked doubtfully, "Mom, if we change the past, will our world change too?"

Bulma fell silent.

At this moment, Yu Xi spoke up: "No, Trunks. If you go back in time and change the past timeline, then the past timeline will become a completely new and independent universe. What happened in the future and the past of that universe will have nothing to do with here."

Trunks frowned: "Sister Yu Xi, are you saying... even if I go back in time and change history, the future of our world won't be affected?"

Yu Xi nodded: "Yes. The timeline is not singular, but multiple. Every time the past is changed, a new parallel universe is created. The future of that universe will develop along a new trajectory, while this world will continue to move forward according to its original trajectory."

Upon hearing Yu Xi's explanation, Bulma, Trunks, and Gohan all fell silent.

Bulma's expression held a hint of disappointment as she murmured, "So... even if we change the past, we can't change our future?"

Yu Xi's eyes held a hint of sympathy: "Yes, your future will still develop according to the predetermined trajectory. Changing the past can only save Sun Wukong in another world, but cannot change your world."

Trunks' expression turned somewhat dejected, and he said in a low voice, "Then... what's the point of us doing this?"

Son Gohan sighed, a hint of helplessness in his voice: "Perhaps... this is fate. We cannot change our past, nor can we change our future."

Bulma looked up, a renewed determination in her eyes: "No, I don't think so. Even if we can't change our own world, at least we can save Goku in another world. The future of that world might be better because of our actions, and that in itself is meaningful."

Trunks and Gohan exchanged a glance, seemingly moved by Bulma's words, and a glimmer of hope rekindled in their eyes.