Naruto said, "Alright, we can chat about the theory of parallel space-time later. Now, let's talk about the enemy you mentioned. What kind of person is the guy who drained Sasuke's Chakra until he was exhausted?"
Sasuke answered, "This person is very strong. His name is Ōtsutsuki Urashiki. He is after Nine-Tails."
"He has the Rinnegan and possesses the ability to travel freely through space. During battle, he can open space rifts at any time to shift his position. He is extremely fast and hard to guard against."
"Besides that, he also has a red fishing rod that can fish away other people's Chakra. Ranged, melee, it can extract it even through defensive measures. The Chakra thread at the end of the fishing rod can ignore most defenses."
"Once Chakra is fished away by him, ordinary ninjas lose their ability to fight on the spot, and even a Jinchuriki will have a large chunk drained."
Naruto folded his arms across his chest. "He is indeed a troublesome enemy."
Sasuke glanced at Naruto. "And one more thing. Urashiki has a habit of observing before acting, he won't charge in and try to snatch it by force. He will watch from the shadows and wait until the target is relaxed or alone before making a move. So if you are alone, he will definitely choose that moment to strike."
Naruto nodded and asked, "When will he arrive? Is there a specific time?"
Sasuke shook his head. "There is no specific time. In the space-time tunnel, I fought him and we were separated by turbulence. I landed with Boruto first."
"According to what Karasuki said, Urashiki should arrive a few days after us. It could be today, it could be tomorrow, or it could be the day after. In short, within these few days, he could appear in any corner of this space-time at any moment."
Naruto stood up. "In other words, he hasn't arrived yet. That's perfect. I have to leave the village for a mission."
"By the way, Boruto, come with me. I'll take advantage of these few days to teach you a few things."
Naruto knew that Boruto would be forced to make an enemy of the entire Ninja World in the future. Teaching him some self-defense techniques now would be better than him suffering on the battlefield later.
"Huh? Oh, okay Dad."
Boruto was stunned, then sprang up from his seat and stood beside Naruto.
Sasuke also stood up. His expression darkened, and his tone was even more serious than before. "Naruto, I am not joking. That guy is really dangerous. His Rinnegan can see through the weaknesses of most Ninjutsu. Few people targeted by him have managed to escape unscathed."
"You are going to leave the village for a mission now, and Boruto is following you. If you are attacked by Urashiki..."
"Alright, Sasuke. I didn't say I was going to fight him head-on. If I really run into him, I can still run away."
As he spoke, Naruto pulled a Flying Thunder God Kunai from his Ninja tool pouch and tossed it over.
"This is my Flying Thunder God Kunai. If I run into him, I will teleport to your side. The mission must be done. It's an S-Rank mission that's already been accepted, I can't cancel it last minute. If you're really worried, come with me."
Sasuke gripped the Flying Thunder God Kunai and fell silent.
He thought about how the Naruto in his own world never learned the Flying Thunder God Technique even after becoming the Hokage, whereas the Naruto in this world used the Flying Thunder God Technique as naturally as breathing.
Finally, he sighed and put the Kunai away. "Fine, but I won't help you with the mission. I will only guard near you and intervene when you are in danger."
After saying this, he transformed into a blurry figure and vanished from the living room.
Naruto thought for a moment, and pulled a scroll out of his Ninja tool pouch, handing it to Boruto. "Keep this safe. Let's go."
"Oh... Okay, Dad."
Boruto took the scroll with both hands. He carefully placed it into his Ninja tool pouch, and then quickly caught up with Naruto.
Arriving at the gates of Konoha, Naruto handed his village-leaving permit to Izumo, who was on duty.
Izumo took the permit, glanced at it, and looked at Boruto behind Naruto. His gaze lingered for a second on Boruto's blonde hair and the whisker marks on his face, before he smiled and returned the permit to Naruto.
Beside him, Kotetsu crossed his arms and waited until the two had walked far away before muttering, "Why does that kid look exactly like Naruto? A long-lost brother?"
Izumo shrugged and closed the register. "Anyway, since he's with Jonin Naruto, there's no need to ask too many questions."
...
Boruto took a deep breath of the fresh air outside the village and couldn't help but ask, "Dad, what kind of mission did you take?"
"An S-rank mission: to stop the Fourth Raikage."
"Huh? An S-rank mission?" Boruto tripped slightly, almost losing his footing.
He quickly stabilized himself and his eyes lit up. "Dad, you're taking on S-rank missions at such a young age? That's amazing!"
On a certain tree, Sasuke watched the father and son below. His single exposed eye narrowed slightly. 'An S-rank mission? To stop the Fourth Raikage?'
There had indeed been plenty of friction between Kumogakure and Konoha, but in the timeline of his world, Naruto at this age had never taken on any mission to stop the Raikage. The differences between parallel dimensions are indeed quite vast.
Sasuke crouched down against the tree trunk, his right hand resting on the sword at his waist. His Rinnegan swept over the surrounding terrain, habitually making a tactical assessment for the upcoming battle.
Below.
Naruto turned his head to look at Boruto's excited face and smiled. "Your dad is actually very strong right now."
After saying that, Naruto felt it sounded a bit too shameless, so he added, "You can be too in the future."
Hearing this, Boruto looked delighted and straightened his shoulders.
Naruto glanced at Boruto and changed the subject, "What Ninjutsu do you know how to use by now?"
Boruto immediately puffed out his chest, a proud look on his face. "Right now, I know the Shadow Clone Technique, Rasengan, Wind Release: Gale Palm, Lightning Release: Lightning Ball, Water Release: Wild Water Wave, and Shadow Clone Shuriken."
Naruto nodded and praised, "Not bad."
Just as Boruto's smile began to widen, he added, "But you still have a long way to go."
Boruto's expression froze, the curled corners of his lips suspended in mid-air, unable to go up or down.
He stiffened his neck and said defiantly, "Dad, I'm really strong right now."
Naruto pointed at the Ninja tool pouch at Boruto's waist. "The scroll I just gave you contains your grandfather's signature Ninjutsu, the Flying Thunder God Technique. In addition, your grandmother's Fuinjutsu and some of the Uzumaki clan's Fuinjutsu are also inside."
Boruto was taken aback. "Grandfather's? And grandmother's?"
"Yeah."
Naruto withdrew his gaze and continued looking at the road ahead. "Study it well during this time. If there's anything you don't understand, ask me."
"Back then, your grandfather relied on the Flying Thunder God Technique to fight his way in and out of the Third Great Ninja War, and your grandmother's Fuinjutsu was also very strong."
"I've already mastered almost all of it. Since you're about my age, if you can't master it, that would be too pathetic."
Boruto clenched his fists, a blazing fighting spirit igniting in his eyes. "Don't underestimate me, Dad. Just watch, I'll definitely learn it."
"Isn't it just space-time Ninjutsu? I was first in my class in theory at the academy."
As he spoke, Boruto pulled the scroll out of his Ninja tool pouch, wishing he could spread it out and read it right then and there.
Naruto smiled and reached out to ruffle Boruto's hair.
Boruto froze, looking up at Naruto's face. In his world, after his dad became the Hokage, he got busier and busier. Not only did he rarely pat his head, but they had less and less time to even have a meal together.
Naruto withdrew his hand, his tone softening a bit. "Alright, let's see what you've got."
Boruto nodded and put the scroll away. He said in a firm tone, "Yeah, I never go back on my word."
"Alright, let's pick up the pace."
With a kick of his foot, Naruto leaped onto the branch of a tree. Boruto quickly followed.
Soon, two golden figures shuttled rapidly through the forest.
Naruto intentionally suppressed his speed, maintaining a rhythm that Boruto could just barely keep up with. Occasionally looking back at Boruto's landing posture and breathing rhythm, he taught him how to distribute Chakra more evenly to the soles of his feet and how to use the rebound force of the branches to save physical strength while they traveled.
These techniques were advanced applications passed down to him by Minato.
Boruto's eyes shone as he listened. After trying it a few times, his speed improved significantly, and he immediately began darting excitedly among the branches.