Naruto: I, Naruto, started with the Rinnegan

"What do you think of this Uchiha clan territory? I can have it all... No, I can give you half of the territory."

My name is on the property certificate?

Naruto said with a strange expression, "No need. I don't want your clan's land. Give me 200,000 taels of silver, cooperate with me in an experiment, and then I can consider helping you train."

Uchiha clan.

Sasuke's house.

Inside the living room, Sasuke placed his hands on Naruto's shoulders and continuously channeled chakra into Naruto's body.

A few minutes later, Sasuke ran out of chakra, lowered his hands, and looked at Naruto, who was deep in thought with his eyes closed.

"This guy... is getting weirder and weirder."

I inexplicably found myself transferring chakra, and I had no idea what the purpose was.

"This shouldn't be happening. My eye power hasn't changed at all. What happened to the saying that Indra plus Ashura is roughly equivalent to the Rinnegan...?"

Even after Sasuke's chakra within him had completely dissipated, Naruto's Rinnegan remained unchanged.

He opened his eyes, frowned in deep thought, and after a long while, looked up at Sasuke.

"This time, it's my turn to transfer chakra to you."

Ten minutes later.

"Why... can your chakra increase my eye power?!"

Sasuke touched his eyes, his expression filled with deep confusion.

The growth of eye power is not like that. Isn't eye power usually cultivated slowly or increased naturally over time? Why can it be increased by receiving other people's chakra?

I can't bear to learn this!

Naruto didn't explain, but said, "Let's go to the kitchen."

.........

It took Naruto half an hour to convince his parents to reluctantly stop opposing his morbid curiosity.

Under Sasuke's slightly terrified gaze, Naruto pinched his nose and drank half a bowl of blood that had flowed from Sasuke's cut wrist.

After waiting for a long time, Naruto finally sensed the change in his eye power.

"My pupil power... has increased slightly."

Very few, almost negligible, but that doesn't matter; it's significant.

This means that Naruto's thinking is correct; he can upgrade his Rinnegan by collecting Indra's chakra or through other methods.

Three-tomoe jade, six-tomoe jade, or even nine-tomoe jade... are no longer just a dream.

"You shall also drink a bowl of my blood."

Naruto painfully cut his wrist, filled a bowl with blood, and then handed it to Sasuke to drink.

"I won't drink it. I'm not a pervert, why would I drink human blood?"

Sasuke shook his head repeatedly and retreated step by step, his resistance obvious.

"I'm not a pervert!"

Naruto, his face dark, shoved the bowl into Sasuke's hands and said, "If you want to increase your strength to get revenge, then drink this... Of course, if you don't want to, then just pretend I didn't say anything."

Sasuke naturally wanted revenge, but only by drinking blood...

Sasuke hesitated. "Like the chakra transfer before, can it increase eye power?"

"It might even help you unlock the Double Tomoe."

Even Naruto himself didn't believe that. He'd only recently unlocked the single tomoe, how could that be...?

Holy crap!!! This can't be right!!!

"You actually opened it!!!"

Naruto stared wide-eyed at the two tomoe in Sasuke's right eye, thinking that the effect was too remarkable, almost worlds apart from his own.

He became increasingly certain of his conjecture—

His own Ashura chakra was activated to a certain extent, so both his own chakra and blood could have an effect on Sasuke.

Sasuke's Indra chakra is hidden within his body, so Sasuke's chakra is useless to him, but Sasuke's blood is useful to him.

Does this mean I have to drink Sasuke's blood every day?

No!

This is disgusting; I'd rather not upgrade my Rinnegan.

"We have no choice but to find another way: ask the Sage of Six Paths for a cheat code, ask the Tailed Beasts for chakra, or help Sasuke improve his Sharingan and increase the development of Indra's chakra..."

……

Looking at himself in the mirror, with a single tomoe on his left and two tomoe on his right, Sasuke, whose mind had been tense ever since the destruction of his clan, showed a relaxed smile for the first time.

He clearly felt that his dream could come true.

Rather than the last shred of stubbornness in the face of despair.

"Uchiha Itachi, I will soon gain power equal to yours... no, power surpassing yours, and then... I will kill you!!!"

Suppressing the murderous intent boiling within him, Sasuke turned to Naruto and made a request.

Blood, chakra, soul energy...

Sasuke wanted all of these things that could enhance his strength.

Naruto only gave chakra and soul energy, refusing to give blood, saying it was too disgusting.

After struggling until evening, Sasuke still hadn't managed to transform his double tomoe into a complete form.

The two agreed to continue later.

In the following days, Naruto gave Sasuke whatever he wanted, even going so far as to give him several bowls of his own blood, all so that Sasuke could quickly activate Indra's power and benefit him.

Unfortunately, pulling up seedlings cannot help them grow.

The evolution of the Sharingan requires intense mental stimulation. Naruto's blood, chakra, and soul energy can only act as a catalyst and reduce the difficulty, but cannot completely replace it.

Are you trying to provoke Sasuke on purpose?

Under Kushina's gentle reprimand, Naruto abandoned his impulsive idea.

Then, Naruto said to Sasuke, "Let's pause the experiment. From now on, I won't give you my blood, I'll give you chakra once a day, and my soul energy and life energy once a week... In exchange, you'll also give me chakra once a day. Is that alright?"

"No!"

Sasuke nodded in agreement, knowing full well that he was the one who would benefit.

……

On a dark and windy night, people are killing people and setting fires.

Konoha Village under the cover of night.

The spatial vortex twisted, and Obito emerged from it, appearing outside an ordinary apartment building.

Tell me about the recent situation of the Nine-Tails Jinchuriki.

A white Zetsu emerged from the ground and replied, "As usual, the Nine-Tails Jinchuriki spends his time either at school or training with Uchiha Sasuke."

"The Jinchuriki is actually training with the Uchiha clan. It seems Itachi's efforts haven't been in vain; his younger brother has already gained Konoha's recognition..."

With a mocking laugh, Obito asked, "Didn't you notice anything unusual? Any unusual behavior, or unusual people?"

Bai Jue replied decisively, "No!"

"waste!"

Obito waved for White Zetsu to get lost, then looked up at the apartment building, a red light flashing in his eyes, before disappearing from sight.

.........

In the dimly lit bedroom, the little boy lay on the bed, fast asleep, clearly in a deep sleep and unlikely to wake up easily.

The spatial vortex twisted, and Obito appeared at the edge of the bed, looking at Naruto with neither joy nor sorrow, and drew the katana from his waist.

Swish!

A cold glint flashed, and Naruto's neck was cruelly severed.

"not good!!"

The moment Obito struck Naruto's neck, he sensed something was wrong and quickly unleashed Kamui to get into position.

But it's too slow!

A Rasengan blasted into Obito's back.

boom!

His body was pierced, the floor was shattered, and the loud noise echoed in all directions, breaking the tranquility of the night.

"Enemy attack!!!"