1 The Beginning - Sign-in, Rinnegan

Konoha, Year 47.

The Kannabi Bridge.

Looking around, the place was filled with ruins and debris, with deep craters on the ground caused by powerful ninja techniques, some still emitting faint traces of blue smoke.

The chilly mountain wind occasionally blew, intensifying the already pungent smell of blood in the air.

Clearly, a fierce battle had taken place here not long ago.

On this desolate battlefield, seven or eight figures stood before a heap of rubble made from massive stones.

These figures were all ninjas from Konoha, with most of them wearing the emblem of the Konoha Military Police Force on their clothing.

Indeed, most of them were from the Uchiha clan of Konoha, making up the majority of the Konoha Military Police Force.

Usually, the Konoha Police were responsible for maintaining the village's security. However, with the Third Great Ninja War raging on, Konoha's ninja forces were severely stretched.

Even some recently graduated genin from the ninja academies had been thrown into the battlefield, let alone the members of the Konoha Police.

...

"Kakashi, is this the place?"

Uchiha Shisui, who was in charge of leading the team, took a look around the scene and turned to ask the non-Uchiha boy standing at the forefront.

The boy had his left eye closed, and a wound could be seen spanning across his upper and lower eyelids. It was evident that his left eye had been gouged out with a sharp tool.

This person was none other than Kakashi, the son of Hatake Sakumo.

Beside Kakashi stood another member of Team Minato, Rin Nohara.

The third member of Team Minato, Uchiha Obito, was absent at the moment because he was buried under the ruins in front of everyone's eyes.

Kakashi nodded, "Yes, this is the place. Everyone, please get to work quickly and dig Obito out as soon as possible!"

"Let's do it!"

Uchiha Shisui waved his hand, and the members of the 'Konoha Military Police Force' no longer wasted any time. They immediately moved forward, removing the debris piece by piece, and began the earnest rescue operation.

"Oh my god, Uchiha Obito just died, and the battle at the Kannabi Bridge just ended? Why did I have to transmigrated to such an awkward period?"

Little did anyone know, one of the Uchiha clan members who was moving rubble had a distressed expression on his face.

This person's name was Uchiha Ryujin, 12 years old, just graduated from the Ninja Academy, and possessed the strength of a Genin but had not awakened the Sharingan.

He was an ordinary Uchiha clan member.

On the surface, nothing seemed amiss, but in reality, ten minutes ago, his soul had already been taken over by another soul.

Indeed, the current Uchiha Ryujin had become a genuine transmigrator.

Before he was transmigrated, Uchiha Ryujin was a fan of anime. As one of the highly popular manga, he was very familiar with Naruto from his previous life.

Thus, even though he had just transmigrated not long ago, Uchiha Ryujin accurately deduced the timeline he was currently in.

It was an era of turmoil!

As an ordinary genin, he was utterly insignificant in such a dangerous world.

[Ding! Sign-In System successfully bound!]

[The host can sign in at certain special locations, and the more unique the location, the more abundant the rewards.]

[Some locations can be signed in repeatedly, while some others can only be signed in once. The host will have to explore on their own.]

As Uchiha Ryujin was moving the stones, a series of mechanical electronic sounds suddenly rang in his mind.

Uchiha Ryujin couldn't help but be stunned for a moment, then immediately became excited.

Finally, his cheat had arrived!

[Detected sign-in location. Host, would you like to proceed with the sign-in?]

Following the system's inquiry, Uchiha Ryujin's mind once again heard the system's voice.

"Sign-In!"

What else is there to hesitate about?

Uchiha Ryujin immediately responded to the system in his mind with determination.

"Ding! Congratulations, host, sign-in successful. Reward: Rinnegan!"

Ri...Rinnegan!?

Clang!

The large stone in Uchiha Ryujin's hand suddenly fell to the ground, smashing onto his own foot. However, the overwhelming shock made him feel no pain.

Because at this moment, Uchiha Ryujin was utterly dumbfounded.

'The Rinnegan! The system is too amazing! I got the Rinnegan as the first sign-in reward! This is the ultimate form of the Sharingan! An incredible cheat!'

In his mind, Uchiha Ryujin kept shouting with excitement, almost unable to contain himself.

Rinnegan's existence in the world of Naruto needs no explanation. Just thinking about the mid-level boss, Nagato Uzumaki, who possessed the Rinnegan, was enough to illustrate its power.

Each of the Six Paths' abilities was incredibly formidable. The likes of the Tailed Beasts were nothing when faced with the power of Chibaku Tensei. Characters of the god tier in the ninja world were practically invincible.

Uchiha Ryujin couldn't believe that he, a plain and ordinary genin, had suddenly become such an overwhelmingly powerful figure.

The disparity was just too great, leaving Uchiha Ryujin almost unable to process it all.

"Ryujin, what's wrong?"

A voice interrupted Uchiha Ryujin's thoughts, and he saw Uchiha Shisui tilting his head, looking at him inquiringly.

The others also had serious expressions as they gazed at Uchiha Ryujin.

It was understandable that they were all on edge; the atmosphere was tense as they had just experienced a fierce and devastating battle, and the enemies could still show up at any moment.

This is Uchiha Shisui?

Ryujin took a quick glance at the person before him and noticed that he was a teenager who seemed to be of similar age to Kakashi.

The exact age of Shisui was not explicitly stated in the Naruto series, leading to some disputes.

Some fans speculated that Shisui was three or four years older than Itachi based on scenes where they appeared together. However, this method of judging age solely based on appearances was unreliable in the Naruto universe. It would be more reasonable to use the plot and background to make an educated guess.

The exact age of Shisui was not explicitly mentioned in the Naruto series. However, based on his appearance and the context in which he is referenced, it is likely that Shisui is from the same generation of characters as Kakashi and Obito.

Moreover, for a ninja to gain a reputation in the war era and achieve a specific title, it would be more reasonable if Shisui were slightly older, making him a prominent figure from a younger age.

"It's...nothing..." Uchiha Ryujin replied hesitantly.

Facing Shisui's gaze, Uchiha Ryujin immediately waved his hand and replied casually. However, he noticed that everyone was still staring at him intently.

It was then that Uchiha Ryujin suddenly realized that this was not his previous life but a ninja world!

As a genin, though he might not possess great strength, he was still a trained warrior who had put in countless hours of hard work. How could he possibly struggle to lift a mere stone? His casual response was clearly not enough to dispel their suspicions.

"I'm just... afraid to see Obito's... body," Uchiha Ryujin quickly spoke in a mournful tone.

Everyone then understood. It turned out that Uchiha Ryujin was scared to confront the possible reality that Uchiha Obito might be dead.

"Ryujin, we are all shinobi, and defending the village at all costs is our duty! Even if it means giving our lives, it's worth it. Obito, if he has truly fallen, is still a hero," Uchiha Shisui said with a serious expression, trying to comfort Uchiha Ryujin.

"No, Obito won't die!" Kakashi clenched his teeth, speaking with unwavering determination.

The others sighed softly; after being buried under so many massive rocks, it was highly unlikely that Uchiha Obito could have survived. How could he still be alive?

However, they could understand Kakashi's feelings and didn't say much in response.