Sky Arena.
Kevin hadn't been here for almost two weeks, busy with pharmaceutical work and building his Nen Ability.
As soon as he stepped into the building, before even reaching the elevator, he saw a white-haired child waving madly at him.
Wasn't that Killua?
Kevin walked forward, and Killua, holding snacks, quickly ran over.
"Where have you been all this time? I thought you were dead."
Killua's first words were astonishing.
After all, after realizing he hadn't seen Kevin for a few days, he had done a simple investigation.
Since coming to the arena, Kevin had never gone a week without a single fight.
"Thanks for your concern. I've been in seclusion training for the past two weeks, and I've gained quite a lot," Kevin replied with a smile, even intentionally demonstrating a burst of his aura.
He knew, of course, that aura was invisible; he was just used to demonstrating it in context.
However, at that very moment.
Killua's expression changed abruptly, and he instantly leaped back several meters, staring seriously at Kevin.
This scene surprised Kevin; his aura settled back to normal after the brief burst.
Killua gradually calmed down, but his expression still held surprise and doubt.
"Your intuition is very sharp; you actually noticed it," Kevin couldn't help but praise.
There were countless people in the world without Nen Ability, but Kevin had never seen anyone like Killua who could sense it so accurately and react so quickly.
No wonder he could reach above the 150th floor at six years old. Was this talent?
That annoying talented brat!
Killua had already returned to his previous state, his small face serious, as he looked at Kevin and asked, "What was that just now? That aura."
He paused, then explained, "Before, I felt something similar... this kind of aura... from my older brother."
"Ah, no wonder," Kevin understood.
He had learned about the Zoldyck Family online and couldn't help but marvel again at the fantastical nature of this world.
A legal family of assassins, who would have thought?
Even the area they lived in was a famous tourist attraction. Was that reasonable?
However, this also indirectly reflected the powerful strength of the Zoldyck Family.
Now it seemed their family must have a legacy of Nen Ability, which explained why Killua's talent was so high.
As for why Killua hadn't been taught Nen Ability, perhaps it was because he was too young?
Kevin couldn't be sure.
But based on his understanding of Nen Ability, he could roughly guess the reason.
After all, Nen Ability was closely related to a person's experiences from childhood, their growth environment, and their personality.
Killua was still a child and had not yet formed a complete sense of good and evil, right and wrong, or a worldview; even his own preferences and thoughts were still being shaped.
Introducing Nen Ability too early might not be a good thing.
Kevin, of course, didn't know the specifics and could only speculate.
"This is a special kind of aura. When you grow up, you'll naturally understand."
Kevin could only give this kind of adult-like answer.
As expected, Killua frowned when he heard this, looking very unhappy.
"Hahaha," Kevin laughed, rubbing Killua's white hair, "Don't be so gloomy, kid. Growing up is a necessary process."
Killua unhappily slapped Kevin's hand away and angrily ate the snacks in his hand.
"By the way, what floor are you on now?"
Hearing this, Killua snorted and said, "Floor 170. I thought you were dead, so I went and fought a few more matches."
Kevin nodded slightly, "That's good. This way, our chances of meeting are higher. Do you want to go register together?
I bet you'd rather fight me now, right?"
"Ha, just what I wanted. Let's go, let's go."
Killua threw his snacks away, grabbed Kevin, and quickly walked towards the registration desk.
Before, he wasn't very interested in this, only seeing it as making a friend with Kevin.
But now he was very interested.
He still remembered Kevin saying before that he would spar with him regardless of winning or losing, and now he was full of enthusiasm.
Perhaps he could learn that ability through sparring? Killua was very confident in his learning ability.
...
In the corner of the hall.
A tall man with straight black hair stood there with a gloomy face.
His eyes were hollow as he stared intently at Killua pulling Kevin away, especially the scene where Killua was holding Kevin's hand.
"No... I can't make a move. Father's order is to observe."
He muttered to himself, trying to suppress the killing intent in his heart, fearing it would be noticed.
People around him, seeing this, couldn't help but walk around him.
"If, if he tries to teach Killua Nen Ability... then, maybe..."
He continued to mutter, seemingly thinking about something in his mind.
At this stage, it was indeed not the time for Killua to learn Nen Ability. To eliminate this possibility and prevent harm, doing so should be correct, right?
Suddenly, his emotions calmed down, and he took out his phone from his pocket.
"Hello."
"...Yes, I understand."
After hanging up the phone, his expression became somewhat regretful, and his whole demeanor became even more gloomy.
After registration was complete.
Kevin said goodbye to Killua; their fight was scheduled for tomorrow.
After all, both of them were highly anticipated and talked-about fighters, so they naturally had to build up the hype first.
"Ring, ring."
Kevin picked up his phone.
He rarely used this phone since he bought it; its functions were limited, with almost no other use besides making calls and sending messages.
Moreover, he had few numbers stored in his phone, and very few people knew his number.
The caller ID showed -- Mito.
"Hello?"
"Oh, I see."
"No problem, I'll be right there."
After hanging up, Kevin went straight to the barbecue restaurant he had visited before.
The waiter led him directly to a private room.
Inside the private room, Mito was staring seriously at a small mountain of meat skewers in front of him, deep in thought.
"What are you thinking about?"
Kevin's sudden appearance startled Mito.
"What are you thinking about? You've lost all your vigilance?" Kevin was a little puzzled.
Mito sighed, muttering, "During these two weeks you were in seclusion, I reached the 200th floor.
As I walked in the hallway on the 200th floor... I felt a strong malevolence, it was absolutely chilling."
Kevin understood immediately and roughly guessed why the other party had called him over.
Sure enough.
Mito asked, "What was that? That overwhelming malevolence? You should know, right? After all, you're so amazing."
He considered himself strong, but facing Kevin, he still felt powerless, even unable to inflict harm.
And undoubtedly, Kevin was the strongest person he knew, so when he felt that inexplicable malevolence on the 200th floor, he immediately thought of Kevin.
"It's quite embarrassing to say," Mito leaned back in his chair, looking at the ceiling, "At that time, I was so scared I just wanted to escape quickly. For a martial artist, that's really too shameful."
After speaking, he looked at Kevin with bright eyes.
"Please tell me, what exactly was that?"