Sign-in For Eight Years

Konoha.

The Hyuga Clan.

The vast courtyard was adorned with opulent and magnificent decorations, yet the layers of overlapping buildings carried a stifling sense of being "locked deep within an imperial palace."

An eight-year-old boy suddenly stood up.

A pair of pure white eyes gazed out the window.

Holy crap! I transmigrated?! This is... Konoha in the Naruto world.

And... I'm a member of the Hyuga Clan's branch family?

Hyuga Kagami looked at the large, empty room before him. There was no furniture, and a few instant noodle cups that hadn't been cleaned up in days sat on the table. Even for a member of the Hyuga branch family, surely it shouldn't be this miserable?

In his past life, although he had been crushed under the immense pressure of mortgage, car, and parking space loans, he hadn't been reduced to such a pathetic state!

Since I've transmigrated, I should at least have the benefits of a transmigrator, right?

Hyuga Kagami tentatively asked, "System?"

[Ding! Heavens Sign-in System successfully activated!]

A cold, electronic voice rang out in his mind.

Hyuga Kagami's eyes lit up. This, I can work with.

[Ding! Since the host has never interacted with the system, an explanation will be provided!]

[This system is the Heavens Sign-in System. The host can receive random rewards from the heavens and worlds by signing in every day!]

[Every 10, 100, 1,000, 10,000, and 10,000 days of consecutive sign-ins... will grant a high-probability sign-in reward!]

[Ding! The system has detected that the host has not signed in for eight years!]

[Would you like to begin a retroactive sign-in?]

What???

Retroactive sign-in???

The system's cold voice echoed in his mind, and Hyuga Kagami was instantly stunned.

I know about "Heavens Sign-in" systems; I read these kinds of novels all the time in my past life. By signing in, you can obtain various abilities from all the worlds, gain immense power without needing to cultivate, and reach the pinnacle of life!

But... what's this about not signing in for eight years?

Hyuga Kagami's face was full of confusion.

Didn't he just transmigrate into this world?

Suddenly, a flash of inspiration struck his mind!

This boy named Hyuga Kagami is exactly eight years old this year, which means... this system isn't my cheat, it was the original owner's cheat!

But unfortunately, due to the system's delayed awakening, the original owner never got to experience the pinnacle of life and instead died in this room.

And now that he had transmigrated into this body, both the system and the power were all his!

"Begin the retroactive sign-in immediately!"

Hyuga Kagami commanded without hesitation.

[Ding! Would you like to perform a one-time retroactive sign-in for eight years?]

"Yes!"

Hyuga Kagami nodded heavily. If he could get stronger through retroactive sign-ins, he certainly wouldn't let the opportunity slip by!

[Ding! Congratulations to the host for obtaining the 'Absolute Control' talent!]

[Ding! Congratulations to the host for obtaining Fire Style: Great Fireball Technique!]

[Ding! Congratulations to the host for obtaining all chakra natures!]

[Ding! Congratulations to the host for +1 to base attributes!]

[Ding! Congratulations to the host for +100 to base attributes!]

[Ding! Congratulations to the host for +1000 to speed attribute!]

[Ding! Congratulations to the host for +10000 to strength attribute!]

[Ding! Congratulations to the host for obtaining the Sage Body!]

[Ding! Congratulations to the host for obtaining the ninjutsu: Rotation!]

[Ding! Congratulations to the host for obtaining Wood Release!]

[Ding! Congratulations to the host for obtaining the Fish-Fish Fruit, Model: Azure Dragon!]

[Ding... Sign-in system leveled up! Promoted to C-rank system! The host can now obtain powerful rewards from signing in.]

[Ding... Sign-in system leveled up! Promoted to B-rank system! The host can now obtain even more powerful rewards from signing in.]

[Ding... Sign-in system leveled up! Promoted to A-rank system! The host can now obtain even more powerful rewards from signing in.]

[Ding... Sign-in system leveled up! Promoted to S-rank system! The host can now obtain even more powerful rewards from signing in.]

[Ding... Sign-in system leveled up! Promoted to SS-rank system! The host can now obtain even more powerful rewards from signing in.]

Within Hyuga Kagami's mental space, an infinite surge of power poured into his body. His physique acted like a universe, tirelessly absorbing every ounce of energy.

This feeling of immense fullness filled his heart with satisfaction, and Hyuga Kagami felt the power constantly welling up within him in astonishment.

These powers fused with his body.

There was no sense of rejection whatsoever!

Logically, with so much formidable power converging into his body, he should have been unable to withstand it, yet Hyuga Kagami was surprised to find that his body didn't feel the slightest bit bloated!

"Is this... the power of the system?"

From One Piece, the Fish-Fish Fruit, Model: Azure Dragon!?

Hyuga Kagami's pupils constricted, his breathing grew rapid, and he felt a sense of unreality.

"It's Kaido's Fish-Fish Fruit!? The fruit belonging to the man known as the 'Strongest Creature' in One Piece, who used Thunder Bagua to knock Monkey D. Luffy unconscious with a single blow!?"

"With dragon horns on his head and a giant club in his hand, smashing anyone he doesn't like with a Thunder Bagua—that is the true romance of a man!"

Although he had only just acquired this power.

It was enough to make Hyuga Kagami a powerhouse!

Even when the system was only D-rank, it had provided such a strong reward.

Now that the system had been promoted to SS-rank, the probability of triggering high-tier rewards would increase significantly!

As he continued to sign in.

He would obtain more and more of Kaido's power, and eventually... he would be able to transform into that terrifying giant dragon, conjure thunderclouds that blotted out the sky, and sweep away all enemies!

BOOM!

The power surged into Hyuga Kagami's body instantly, rampaging through him with tyrannical force.

It actually caused him pain, a sensation he hadn't felt during previous power fusions.

"My muscles are tearing; my physical body is undergoing a massive transformation, becoming tougher and stronger. In the world of Naruto, even Kage-level powerhouses have fragile bodies."

Hyuga Kagami gritted his teeth, cold sweat beading on his forehead.

He endured the pain, yet his eyes burned with excitement!

"Ninjas in the Naruto world seem to have leveled up in the wrong direction. They clearly possess great power, yet their bodies are fragile—like assassins with high attack but low defense. But with the Kaido template, I am a tank with both high attack and high durability!"

After a long while, Hyuga Kagami's breathing gradually calmed, and his entire body radiated scorching steam.

He felt burning hot, his skin taking on a faint, crimson hue.

His perspective shifted, and as his white robe slowly slid down, Hyuga Kagami clearly saw the mirror in front of him getting lower.

"I've grown taller."

"And..."

He looked at the reflection in the mirror; his white robe was stretched tight, revealing solid pectoral muscles and a shoulder defined by muscular lines.

"My body is ridiculously strong."

"Is this the power of the Fish-Fish Fruit, Model: Azure Dragon? My strength has expanded to a terrifying degree, and my resistance is equally monstrous. A kunai can barely harm my skin!"

Hyuga Kagami stabbed a kunai down hard.

Yet, not a single drop of blood flowed out.

His skin was as tough as iron and stone!

"Combined with the Sage Body and Wood Release obtained from signing in, as well as the talent for absolute control, my strength is... even greater. And this is only just after obtaining these powers!"

"As I master these abilities, my power will only continue to grow. This... is the power of the system!"

"Any one of these abilities, if revealed, would be enough to make every powerhouse in the world green with envy. One must know that the power of the Sage Body alone was something Orochimaru spent his entire life researching!"

His handsome, peerless face was resolute, his eyes swirling with a dragon-like wildness and dominance!

His spine stood straight, resembling a dragon's bone.

It seemed as though nothing could ever force him to bow his head!