Naruto: I am Uchiha Shirou

"Chimera Jutsu: A forbidden technique capable of devouring and integrating Kekkei Genkai…"

At this moment, sitting at the desk and looking at the terrifying forbidden jutsu handed over to her for development by Shirou, Tsunade couldn't help but exclaim in amazement:

"Shirou, you're a genius. To think you could come up with such a method and develop a forbidden technique like this in just over two years."

For millennia, the ninja world had been researching the powers of Kekkei Genkai, but Shirou had taken an entirely unconventional path to find a new way forward.

"Sister Tsunade, I'm not a genius. It's the power inside me. In moments of life and death, a ninja can often unleash incredible strength."

Lying calmly on the bed, Shirou spoke, finally able to relax a little. From now on, he could use this jutsu openly without fear.

"Sister Tsunade, the data is ready."

At that moment, Kushina retrieved the report from the diagnostic machine nearby, while Mikoto was diligently recording the results.

"As expected!"

Upon seeing the data report, Tsunade raised her golden eyebrows and immediately turned to Shirou lying on the bed, smirking coldly:

 "I knew it. How could such an outrageous forbidden jutsu not have any drawbacks? Sure enough, there's a problem with your jutsu!"

"What? Then, Shirou—he—!"

Hearing this, Kushina immediately showed a worried expression. Meanwhile, Mikoto, who wore a gentle smile as she took notes, showed no trace of emotion. However, the determination in her eyes revealed her true feelings.

Tsunade, sitting back in her chair, sorted the data report carefully before glaring fiercely at Shirou.

"The jutsu is flawed, but Shirou isn't."

Under the confused gazes of Kushina and Mikoto, Tsunade shook her head and began explaining.

"This kind of ridiculously powerful forbidden jutsu has many flaws. To put it simply, how do you deal with the rejection caused by the fusion? This jutsu doesn't solve that issue; it only offers a method for absorbing Kekkei energy.

What's remarkable is Shirou's physique. According to the diagnostic report, his cells contain an incredibly powerful devouring factor. Simply put, any energy that manages to temporarily stabilize in his body will eventually be slowly devoured and integrated over time…"

As Tsunade explained, Mikoto and Kushina finally understood.

The Chimera jutsu itself was flawed, but Shirou's unique physique perfectly resolved the issue—though it still required some time.

At this moment, Tsunade furrowed her brow, contemplating for a moment before speaking seriously:

 "Putting aside Kekkei Genkai and secret techniques, the ninja world has seen various unique physiques. This sort of special constitution isn't unheard of. When you awakened the Sharingan and the Curse Mark Sage Body, the rejection caused by those bloodline traits was resolved in just a few years…

The devouring factor within your body played the biggest role. Over the past two years, Shirou's body has been continuously devouring energy. It's just that this time, the external energy entering him was too much, which caused the current situation…"

Listening to Tsunade's analysis, Shirou went from being utterly confused to suddenly understanding everything.

"Mikoto, Kushina, I think the danger has temporarily passed. The energy from the Wood Release cells within my body has already been sealed. With the devouring factor at work, this power seems to be integrating well. Based on the data projections…

It'll take three to five years at most to fully fuse. For now, though, I think you two can leave for a while. After all, the danger may have passed temporarily, but who knows when I might do something reckless again."

Suddenly, Tsunade slammed the data report heavily onto the desk, her face breaking into a menacing smile as she glared at Shirou with wide eyes.

"Sister Tsunade, this is a misunderstanding! I want to live!"

However, the three women ignored his protests. Kushina squinted her eyes, feigning ignorance, and obediently nodded to Tsunade.

"Lady Tsunade, I'll wait outside. Feel free to discipline him. I'll handle his treatment afterward."

Hearing this, Tsunade's face immediately lit up with satisfaction. Meanwhile, the normally gentle Mikoto squinted her eyes and pulled a scroll from her ninja pouch.

"Lady Tsunade, you might find this useful."

With a poof, as the seal was released, a small, exquisitely crafted red whip appeared. Mikoto gently placed it on the desk with her usual warm smile.

"Mikoto! You two—!"

Shirou's eyes widened in shock, but Mikoto and Kushina acted as though they neither heard nor saw anything. Without a glance back, the two women turned and walked toward the door.

Left alone on the hospital bed, his chakra sealed, Shirou could only watch as Tsunade sat in her chair, idly toying with the whip in her hand.

Until… the door closed.

"Sister Tsu… Tsunade, let me explain!"

Now alone, Shirou nervously swallowed. But Tsunade, still playing with the whip, narrowed her eyes and smiled dangerously.

"Well, well, Shirou. You like to play dirty, huh? So, why don't I play along with you?"

Her arrogant and teasing voice echoed in the room. Just as Shirou awkwardly attempted to respond, he suddenly felt something warm and wet on his cheek.

When he looked up, he froze. Standing beside him, Tsunade had lowered her head, and tears were streaming silently down her cheeks, dripping onto his face.

"Tsu… I'm… I'm sorry…"

At that moment, Shirou felt like things had gone completely out of control. Awkward and guilt-ridden, he realized he had unintentionally made the strongest woman he knew cry.

"Does it hurt?"

Suddenly, Tsunade gently touched his chest, her tear-filled eyes fixated on the spot where she had once pierced him with her hand.

Shirou was stunned for a moment before shaking his head. "No, it doesn't hurt."

"Idiot! I meant the Wood Release cells!"

Tsunade glared at him with fierce eyes, but at this moment, accompanied by her tears, she appeared to Shirou like a proud but vulnerable golden princess.

"It's fine."

Tsunade let out a cold snort. "Earlier, I didn't say anything in front of Mikoto and Kushina. But now, let's talk about your situation."

"You mentioned that the Wood Release cells had been in your body for two years. Such crude methods… Don't you understand? Even in experimental labs, countless adjustments to the data still couldn't ensure survival.

And you said the Sharingan played a balancing role…"

Tsunade raised the data report in her hand. "There's some information here that Kushina and the others wouldn't understand. I didn't want them to know before, either."

"According to the data, the Sharingan does suppress the Wood Release cells. Or rather, the two achieve a certain balance. This balance allowed your devouring factor to work, and it's what gave you the time to create this forbidden technique…"

As Tsunade spoke, she couldn't help but feel deeply shaken. She couldn't imagine that two years ago when Shirou was just fifteen, he had already shouldered such a heavy burden.

He had hidden everything from her, bearing it all alone in the shadows for the sake of the village.

Looking at the figure lying on the bed, Tsunade's nose stung, and she let out a cold snort, her face stubbornly serious as she continued:

"When the Sharingan awakens and evolves, it releases a special chakra energy in the brain. If we classify this energy by attribute, it would be considered yin. Meanwhile, my grandfather, the First Hokage, had a special energy within his Wood Release chakra, which could be considered yang…

The Sharingan and Wood Release, like yin and yang, have achieved a kind of balanced symbiosis in your body. Upon inspection, your Sharingan and the Wood Release energy are gradually resonating with each other…

In simple terms, Mikoto's Mangekyo Sharingan could stabilize the loss of ocular power using this special energy. As long as it's not overused or excessively drained, normal usage won't result in a loss of power—it can even recover."

In just one night, Tsunade had reached such a conclusion in her laboratory. This left Shirou deeply impressed.

Although he had provided the experimental materials and directions, Tsunade's ability to figure it all out in a single night spoke volumes about her expertise in Wood Release research over the past two years.

Seeing Shirou's astonished expression, Tsunade snorted coldly and said:

"Don't look at me like that. Wood Release research has always been ongoing. I just built on what was already there. As for the Sharingan—"

At this, Tsunade paused slightly before continuing nonchalantly:

"The Senju and Uchiha clans were enemies during the Warring States Period. Naturally, we studied the Sharingan. Not to mention my granduncle."

Tsunade's abilities were undeniable, but she wasn't one to take credit for others' work. Her understanding of Wood Release and the Sharingan came from standing on the shoulders of giants—her grandfather, the First Hokage, and her granduncle, the Second Hokage, Senju Tobirama, who had already explored these subjects extensively.

"Now, is it time for you to tell me about the fate of the Senju and the Uchiha? Weren't you acting crazy last night? Didn't you enjoy laughing wildly? Shouting about the destiny of the Valley of the End, saying you'd kill the most important person to awaken the Mangekyou?"

At this moment, Tsunade angrily slammed a data report onto the table, towering over Shirou, glaring at him fiercely with gritted teeth.

"My twenty-plus years of tears, all wasted on being deceived by a brat like you! Now go ahead, act crazy for me again! Laugh like a maniac again! Didn't you even tell me to stab you with a knife!?"

"I…"

Before he could finish speaking, Tsunade stretched out her long legs, straddled him on the bed, and kissed him hard.

In an instant, the metallic taste of blood lingered on their lips. Shirou's eyes widened, and the next moment, the seals on his limbs were undone. Tsunade's reddened eyes locked onto him, biting his lips even harder.

...

"Shirou…"

Tsunade entire body was naked. Shirou sighed in admiration looking at her beautiful body. Her shapely breasts were perfect to grab in a hand.

Tsunade exhaled deeply and looked at him. She then unbuttoned Shirou's clothes shyly.

Shirou simply smiled mischievously while she undressed him. Tsunade blushed and spoke in a mosquito-like voice.

"… What?"

"Nothing, I just thought that Sister Tsunade is truly beautiful."

Tsunade smiled sweetly and kissed him on the chest. "Don't you think I'm old?"

"Impossible!" Shirou denied instantly. "Sister Tsunade is the most beautiful woman I know!"

He then brought his hand to her breasts and pressed them strongly.

Tsunade moaned and lifted her face. Shirou took advantage of that moment to steal her lips and muffled her moans.

Like that, they continued teasing and touching each other. Their hands moved passionately and their bodies were glued to each other.

Shirou could feel the sweet scent coming from Tsunade's body, making him incredibly excited.

Tsunade, on the other hand, was completely wet. Her love juice was sliding through her leg and falling into the bed.

At that moment, Tsunade smiled seductively at Shirou.

"Shirou, let me teach you something…"

Shirou nodded and relaxed his body. Tsunade then narrowed her eyes and grabbed his penis, before starting to play with it.

"Ugh!"

Shirou suppressed a groan and looked at Tsunade. She curved up her lips in a charming smile and lowered her mouth towards his penis.

In the next instant, Shirou's lower body was enveloped in a wonderful sensation.

Tsunade's lips engulfed his penis. She swallowed it all while looking at him with upturned eyes.

Shirou suppressed his desire to shoot everything out immediately and stroked her head gently. Tsunade seemed to like it because she snorted and began to move her head.

Her tongue licked and sucked his penis, and the walls of her throat brought him supreme pleasure. At the same time, her hands stroked and pinched his scrotum, adding even more to his pleasure.

Tsunade's eyes were focused on Shirou's expression. He could feel her joy when she noticed his expression of pleasure. Little by little, her movements became faster and her tongue stimulated his penis.

After five minutes, She began to feel something building up inside him. Shirou just gritted his teeth and endure the desire to cum, enjoying the blowjob to the fullest.

Unfortunately, Shirou could see that Tsunade was beginning to tire. Her breathing had become slightly ragged, and her tongue was a bit stiffer than before.

So, Shirou ceased stopping the flood from breaking.

"I'm cumming!" Shirou warned Tsunade and pressed her head down. She realized his intention and began to move quickly. Her mouth moved up and down repeatedly while waiting for his orgasm.

Finally, his semen flew out.

Shirou penis twitched a pair of times and shot everything inside.

Tsunade simply looked at him without changing her expression.

Shirou could see her swallowing once, two, and three times, and finally, she let go of his penis.

Looking at Shirou, she licked her lips charmingly and blushed.

"Did you like it?" Tsunade asked. Shirou nodded with a smile.

She then hugged him and kissed his lips with more passion than ever.

Shirou could feel the deep love of Tsunade towards him. Holding her soft body in his arms, Shirou put her on the bed. His hand stroked her already wet pussy and his other hand caressed her lips. Tsunade only looked at him with a nervous expression.

Slowly, Shirou opened her legs and put his penis on her entrance. Tsunade moaned slightly and bit her lips.

With a grin, Shirou moved forward.

"Ahhh~" Tsunade moaned loudly and hugged his back.

Shirou enjoyed the feeling of deflowering Tsunade and kissed her shoulders. Then, without giving her time to get used to the new feeling, Shirou began to move.

In the beginning, his movements were a bit slow, but before long, they became deeper and faster. Tsunade's body shook and shuddered under the violent pleasure, doing her best to accommodate his movements.

Shirou grinned and bit her nipples. Tsunade shuddered deeply and let out a scream of pleasure while putting her legs around his waist. Shirou just smirked and continued pistoning.

The feeling of Tsunade's tightness was heavenly. The layers of soft flesh combined with the pressure caused by the narrow walls filled Shirou's entire mind. A great amount of love juice lubricated their two parts and caused his movements to be smoother.

"Shirou~ anh…~ Please…" Tsunade groaned.

Shirou hugged her seductive body and pressed her below him. Tsunade could only accept his movements passively, enjoying the pleasure brought each time he slammed into her.

"So tight…" Shirou whispered in her ear and exhaled deeply. His tongue licked her earlobe causing her to twist her body strangely.

Knowing that the person below was Tsunade, Shirou could not help but feel a strange feeling of accomplishment. The mental pleasure caused by fucking your favorite anime waifu was incredible.

Tsunade moaned repeatedly. Her body twisted around, trying to find the most pleasurable position, and her breasts pressed against his chest, changing in shape every time their bodies moved.

Before long, Tsunade's body twitched.

"Shirou…~" She screamed, and a great amount of love juice flowed from her pussy. Shirou slowed momentarily his movements, but when he noticed she finished cumming, Shirou intensified them again.

"Ahmmm…" Tsunade groaned in pain and pleasure. She wanted to ask him to stop, but when she saw his teasing gaze, she was unable to form the words.

Shirou moved faster and faster, deeper and deeper. His penis touched her womb exciting him completely. Shirou could not help but press Tsunade below and move even faster.

"Anhh… Shirou~ anh anh anh…!"

Hearing Tsunade's loud moans, Shirou put even more strength on his waist and pierced forward. Tsunade was unable to endure the torture and bit his shoulders.

With that as the signal, she orgasmed for the second time.

Shirou put on an excited expression and pierced again. A flood of white liquid flowed from his penis and filled her womb, making her moan incoherently. She had completely drowned in pleasure.

Under his relentless attacks, Tsunade could only groan.

...

Outside the laboratory.

Kushina, her face flushed red, avoided eye contact as she glanced at Mikoto, seemingly hesitating about something. After a long pause, she finally gathered the courage to speak.

"Sister Mi… Mikoto, thank you for last time."

Looking at Kushina, Mikoto gave her a doting smile.

"Shirou likes Kushina, and Kushina is also able to help Shirou. I like Kushina too."

Under Mikoto's slightly twisted mindset, she had accepted Kushina's position and strength from the very beginning. She didn't hide a single thing from Kushina.

As the princess of the Uzumaki clan, inheriting their legacy, a natural-born genius, and the Jinchūriki of the Nine-Tails, Uzumaki Kushina, in Mikoto's eyes, was no less than her equal. Kushina's influence on Shirou's dream of becoming Hokage played an even greater role.

"But Sister Tsunade, she…"

Kushina stammered, her expression awkward. After all, as the Nine-Tails' Jinchūriki, she knew she couldn't marry into the Uchiha clan.

So she'd thought she could just keep things low-key. Mikoto didn't object anyway, so she figured it would be fine. But now, an unexpected variable had appeared.

However, upon hearing this, Mikoto narrowed her eyes and smiled.

"As long as I'm here, the Uchiha will be fine. But Shirou wants peace, and for the sake of the village, he must become Hokage. Lady Tsunade's status is more important than ours."

With a resolute look in her eyes, Mikoto suddenly froze as she noticed Kushina grabbing her hand without her realizing it.

The two of them locked eyes and smiled.

"We'll always be together!"

"No one can betray Shirou! If anyone does, the other will kill them!"

With a slightly unhinged smile, Mikoto's determination to never lose someone important again struck Kushina deeply, and she nodded firmly, silently swearing to herself.

She had to master the power of the Nine-Tails as soon as possible. That way, she could protect Shirou, help him become Hokage quickly, and ensure no one in the ninja world could ever threaten him again!