Several months had already passed since the crisis of the Blade Demon.
During this time, Lexon took no other actions, continuing to simply sign-in with Saitama alone.
Under such focused sign-ins, Saitama's Baldy Invincibility state had been fully signed-in, and it no longer had a time limit.
This meant Lexon's original goal for coming to this world was complete; what remained was signing in for trivial matters.
With the basic sign-ins finished, the day of return was approaching.
Of course, there were still matters regarding the Monster Association and 'God' that needed to be cleaned up.
Lexon naturally wouldn't forget; he would settle everything before his return.
By the way, the sword forms the Blade Demon had captured from Lexon during the battle were now usable again.
Lexon originally thought the capture was permanent, but it turned out it only lasted for a period of time.
However, he didn't care much in the first place.
If his original creations were taken, he'd just create them again; if others' were taken, he'd just sign in for them again. Regardless, the entire Demon Slayer world belonged to him now, so there was nothing to worry about.
"Lexon, why didn't you take that credit?" Saitama asked curiously at the dining table.
"It's not that I don't want it; I'm just setting it aside for now," Lexon responded.
"Setting it aside won't put food on the table," Saitama said. "That merit is enough to make you an S-Class hero. You could earn a lot more money."
"I'm not really interested," Lexon replied casually.
"But that's so much money, Lexon! You could buy whatever you want during supermarket sales!" Saitama's face fell as he thought about the high salary Lexon was turning down.
"You... honestly..." Lexon drawled, a bit helpless. "Why do you care so much about money?"
"After all, we're still young. We should earn and save as much as we can while we're in our prime," Saitama said seriously.
"Why bother? With your strength..." Lexon stopped mid-sentence.
"What?" Saitama didn't quite understand his meaning.
Lexon used Chakra to form a thread, pulling a large drumstick from the plate and stuffing it into Saitama's mouth. "It's nothing. Just eat your food."
"Mmph mmph..." Only muffled sounds remained.
"What level are you three at now?" Lexon turned to the other three at the table.
Needless to say, these three were Genos, Fubuki, and Mumen.
Over the past few months, Lexon had provided them with some gadgets; their strength should have improved significantly.
"Mr. Lexon, with the Breathing Style and sword forms paired with the high-tech mechanical arm blades the two doctors developed for me, plus the Eight Inner Gates already opened to the fourth gate... my current strength is more than ten times what it was a few months ago!" Genos explained with slight excitement.
The 'two doctors' Genos mentioned were his savior, Dr. Kuseno, and Dr. Genus of the House of Evolution, who was controlled by Lexon's Kotoamatsukami.
Both were geniuses. Under Lexon's mediation, they collaborated on research. After Lexon tossed out novel research subjects like 'Monster Cells,' 'Tailed Beast Chakra,' and 'Demon Blood,' the inquisitive Dr. Kuseno had implicitly joined Lexon's camp.
"Teacher, I can use the Byakugan proficiently now, and... I've almost opened the sixth gate of the Eight Inner Gates!" Mumen followed after Genos.
His words overflowed with joy.
That's right, Lexon had implanted a Byakugan into him.
As for how?
It was quite simple.
He just stuffed in the relevant bloodline energy and activated it.
After all, most things from the Naruto world were inside Lexon. The Ancestor of Chakra had even been treated like breeding stock and turned into a maid.
Because of the Sign-in system, all sorts of messy energies and bloodlines were fully compatible within Lexon's body, so converting a Byakugan for someone was effortless.
"'Mist Swordsman,' I have opened my Sharingan to two tomoe and can use it proficiently. I've also opened the fifth gate of the Eight Inner Gates," Fubuki said last.
Since those with a Sharingan gain increased mental resistance, it benefited Fubuki's own psychokinesis.
So Lexon had given her a pair of Sharingan.
The method was no different from how he helped Mumen.
After the three shared their progress over the months, Lexon spoke neutrally: "Mm, not bad."
He acted as if he didn't care much.
Still, the words of praise brought joy to the three of them.
Being recognized made them feel that their months of hard work were worth it.
After all, Lexon had only provided them with a stepping stone.
The Byakugan and Sharingan were just activations, and the Breathing Styles and sword forms were just directly transmitted.
Such a massive improvement in a short time was mostly thanks to their own efforts.
"So, what are your current hero rankings?" Lexon asked again.
"Teacher, I'm already an A-Class hero! And I'm ranked quite high!" Mumen said excitedly.
An A-Class hero... This was a rank he never dared to imagine back when he was a C-Class hero.
"I've risen to S-Class Rank 9, Mr. Lexon!" Genos's emotion remained steady.
Compared to before, his current hybrid of flesh and machinery allowed for more emotional expression.
"I'm an S-Class hero now, too!" Fubuki said, a bit self-satisfied.
With the Fubuki Group disbanded under her orders, she couldn't help but feel a bit proud for bypassing the blockade of Sweet Mask—the top A-Class hero she once thought impassable—to become an S-Class hero.
"Not enough," Lexon said coldly, resting his chin on his hand instead of giving the response they wanted.
The trio's expressions immediately stiffened.
"Mumen, your current strength is beyond that rank. Genos, the same for you," Lexon said. "And Fubuki, don't get arrogant because your strength improved too quickly. Don't forget... you still have things to do. With your current strength... do you think you can defeat that sister of yours? The one who is arrogant, uncute, unreasonable, and acts like a child despite being in her twenties?"
As his words fell, Genos, Mumen, and Fubuki all lowered their heads in shame.
SLAM!!!
But at that moment, the table was slammed violently.
A crisp voice, clearly carrying fury, rang out immediately after.
"Who are you calling arrogant, uncute, unreasonable, and like a child despite being in her twenties?!"
"Oh, sorry. The table was too high; I didn't notice you for a moment," Lexon said with a smile as he looked at the fuming Tornado.
"You...!" Tornado was so angry she was speechless.
"When did she get here? Why didn't I know?" Lexon turned to ask Saitama.
"Didn't you agree to let her come along?" Saitama looked at Lexon speechlessly before advising, "Don't bully kids too much."
"Ah... my bad, my bad," Lexon said without a shred of apology.
"Argh!! I am not a child!" Tornado's face turned beet red.
"Don't be mad, it was just a joke," Lexon said with a smile as he looked at the legal loli.
"This isn't the first time!" Tornado's curly hair seemed to be steaming. "Do you think bullying me is fun?!"
"Yeah, it actually is pretty fun," Lexon replied honestly, his expression unmasked.
"Aaaah!!!" A green glow radiated from Tornado's body as her hair floated up. Her psychokinetic power poured into the dining table, making it shake as if she were about to flip it to express her rage.
However, Lexon stopped the shaking simply by pressing his palm against the table. Then he spoke calmly, "By the way, there's something I need to tell you. I'm about to leave, and I might never come back."
As the words fell, the green light around Tornado abruptly dissipated.
"Huh?"
Simultaneously, five sounds of surprise and confusion rang out.
The expressions on the faces of those who spoke turned to disbelief.
Even the usually indifferent Saitama was the same.
""
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