Hearing this, Young Boruto froze in place, momentarily stunned.
Right, how could he possibly prove it?
For a moment, Young Boruto fell into deep thought.
Suddenly, a flash of inspiration sparked in his mind, and he came up with an idea: he could pose as the disciple of his grandfather, Namikaze Minato.
Though doing this felt a bit unfair to his old man, there didn't seem to be any better option at the moment.
With that thought, Young Boruto hardened his resolve, cleared his throat lightly, and a faint blush spread across his fair face.
With a slightly shy expression, he spoke up: "Well... actually, I am the Fourth Hokage's... disciple."
Kakashi: "???" If you're his disciple, then who am I?
As the words fell, a look of utter confusion washed over Kakashi's face, instantly replaced by sheer disbelief.
With a cold snort, Kakashi's gaze turned pitch black and frosty as he said coldly:
"Hmph, that cold joke isn't funny at all!"
With that, a powerful surge of Chakra erupted from within his body, accompanied by the crackle of electricity as a blinding flash of lightning gathered in his right hand.
The next instant, Kakashi moved like lightning, transforming into a blur as he charged straight at Young Boruto.
Faced with Kakashi's menacing onslaught, Young Boruto showed no sign of panic.
He quickly raised his right hand, a ball of blue light gradually coalescing in his palm. In the blink of an eye, a Rasengan appeared in his hand.
The Rasengan spun at high speed, emitting a heart-stopping wave of energy.
Seeing this, Kakashi abruptly halted his charge, his feet planted firmly into the ground.
With wide eyes and a face full of astonishment, Kakashi locked his gaze onto the Rasengan in Young Boruto's hand, utterly unable to believe what he was seeing.
One had to know that the Rasengan was a Ninjutsu created by Teacher Minato himself. Ever since the teacher's passing, aside from Master Jiraiya and himself, absolutely no one else had been able to master this technique.
Looking at Boruto, Kakashi hesitated and asked:
"You really are the teacher's disciple?"
Young Boruto gave a light cough and replied:
"Of course."
"If you don't believe me, you can test it and see if this is a real Rasengan."
"To think..." A trace of surprise flashed through Kakashi's eyes. He clearly hadn't expected the young man before him to actually be able to use the Rasengan.
Right at that moment, Young Boruto made his move.
He rushed toward Kakashi at lightning speed, thrusting the Rasengan in his hand straight at him.
Seeing this, Kakashi immediately met the attack, Chidori and the Rasengan crashing fiercely together.
Instantly, a violent explosion echoed through the space. Amidst the billowing dust and smoke, Kakashi slid back over a dozen paces, while Boruto stood his ground steadily.
Gazing at the unharmed Boruto, Kakashi let out an inward sigh of amazement.
"It really is the Rasengan..." Kakashi muttered to himself.
Boruto smiled at Kakashi, a confident gleam flashing in his eyes.
"Not only have I inherited my master's Rasengan, but I've also learned other powerful Ninjutsu."
Hearing this, a look of suspicion crossed Kakashi's face as he pondered inwardly.
Powerful Ninjutsu?
What kind of Ninjutsu?
Could it be...
Just as he was thinking, Young Boruto's figure blurred, and in the blink of an eye, he vanished from the spot like a phantom.
The very next second, Boruto's figure materialized without warning right behind Kakashi.
This sudden turn of events startled Kakashi, instantly bringing a familiar name to his mind.
Flying Thunder God Technique!
This super high-level Ninjutsu capable of instantaneous movement had always been a closely guarded secret within the Hidden Leaf Village.
Only the Second Hokage and the teacher could use it.
Standing behind Kakashi, Young Boruto wore a smile, looking calmly at Kakashi's back as he spoke softly:
"Now, you should finally believe me."
Hearing the voice, Kakashi slowly turned around, disbelief still lingering on his face.
He stared at the young man before him who had already mastered such advanced Ninjutsu, his mouth opening and closing as he stammered:
"Could... could you possibly be the teacher's illegitimate child?"
Young Boruto: "......"
Upon hearing this, the smile on Young Boruto's face instantly froze, and he was left utterly speechless.
Is that even a question a normal person would ask?
Helplessly, Young Boruto shook his head and sighed, "Your imagination is truly wild and utterly outrageous."
Scratching the back of his head, Kakashi said awkwardly:
"I suppose it does seem a bit unlikely."
Speechless, Young Boruto retorted, "What do you mean 'a bit unlikely'? It's completely impossible."
"Forget it."
"Can you believe me now?"
Kakashi looked at Young Boruto, pondered for a moment, and said:
"Well... although the Ninjutsu you used is indeed the teacher's, it still doesn't prove that you're his disciple, let alone that you joined the Hidden Leaf with pure intentions."
"Still, for some reason, I have a strange feeling deep down inside."
Curious, Young Boruto asked:
"A strange feeling? Like what?"
Looking at Young Boruto, Kakashi slowly spoke:
"A feeling of... unreservedly trusting you."
Hearing this, Young Boruto blinked in surprise, then asked:
"Then do you trust me?"
Staring right at Young Boruto, Kakashi said:
"To be honest..."
"Did you use an illusion on me?"
Young Boruto: "......"
Annoyed, Young Boruto shot back, "To deal with you, I don't need an illusion, nor do I even need Ninjutsu."
Kakashi: "......"
"The way you talk reminds me of the past."
Full of curiosity, Young Boruto pressed on: "What? Is there someone else who has ever said those exact words to you?"
At that moment, Kakashi lowered his head slightly and reached up to slowly pull down his Headband, a smooth and natural motion that happened to cover his striking Sharingan.
Then, with an unusually calm tone, Kakashi replied:
"No, I said it to him."