Chapter 1:Awakening in another world

The light of dawn streamed through the small window, but for Kosuke, the darkness still enveloped him. His eyes opened to an unknown world, a modest room with wooden walls and the gentle scent of cedar. "Where am I?" he wondered, his mind reeling in a whirlwind of confusion and disbelief.

Kosuke couldn't remember how he had gotten there. The last memory before the void was the sensation of being on his way home from university, interrupted abruptly by a runaway vehicle.

"Am I dead? Did that car kill me?" Kosuke muttered, uncertainty weighing on his voice like an anchor.

He searched for more memories, but found only fog. He closed his eyes and took a deep breath, seeking calm in the midst of the chaos of his mind.

Looking around, nothing was familiar to him. A wooden bed with a humble futon, a small closet in the corner, the open window inviting fresh air to enter.

"This room isn't mine," he concluded, drowning in a sea of doubts.

"Where the hell am I...ah"

Suddenly, a searing headache struck him. Kosuke fell to his knees, the cold floor offering little comfort. His hands shook as he held his head, silently begging for the pain to end.

After long minutes of torment and cries of agony, the pain disappeared as suddenly as it had come, leaving behind not only relief, but also vivid memories of another life. They were the memories of Kosuke Kaguya, a six-year-old boy.

"What kind of hellish pain was that? It was so intense I thought I was going to die.

Wait... these memories, I've been reincarnated in the world of Naruto?" he thought, still struggling to comprehend what had happened. The idea was absurd, but the new memories in his mind were evidence enough.

Still reeling from the avalanche of memories, Kosuke approached a mirror that adorned the opposite wall.

The reflected image was almost unbelievable - a small figure, with hair as white as winter snow, eyes as dark as the deepest night, and two red marks on his forehead, unmistakable symbols of his Kaguya lineage. "So, this is my new self," he whispered, touching his face with hesitant fingers.

Reflecting on his reincarnation, Kosuke couldn't help but wonder about the mysterious forces that shape destiny. "I never imagined I would be reincarnated in the world of Naruto," he pondered.

"How does that work? Is there a God who sends lost souls like me to other worlds?" he questioned himself, allowing his thoughts to wander freely.

As he lost himself in these thoughts, the reality of the present began to impose itself with growing urgency. If the memories that now haunted him were true, in a year, the Kaguya clan would launch a devastating attack on Kirigakure, resulting in its annihilation.

Kosuke took a deep breath, seeking the serenity necessary to organize his thoughts. "I must think clearly and assess my options," he muttered, accepting his new identity.

With his mind finally at peace, he pondered over his possible actions. The idea of convincing the clan to give up the attack was raised, but was quickly dismissed. "The clan's motives for attacking Kirigakure are not clear, besides how could I, a child, persuade stubborn warriors to abandon their battle plans?" Kosuke reflected. Reality was relentless; the Kaguya clan was known for being fierce and inflexible, and he knew it.

Fleeing was a possibility, but Kosuke recognized it was a doomed plan.

"Even if I managed to escape, my limited strength would not protect me from the dangers that lurk outside the village," he pondered, facing the harsh reality. The brutality of Kirigakure, nicknamed "Village of the Bloody Mist," was a constant reminder of the unforgiving world of Naruto. The tension of an impending civil war, fueled by Madara Uchiha's intrigues, also weighed heavily on the Land of Water.

As the reality of his situation became clearer, Kosuke knew he needed to strengthen himself quickly.

Rummaging through his memories in search of any useful knowledge, he remembered that an elder of the clan taught basic techniques to young members every morning.

"This may be a start but just basic training won't be enough to strengthen me in time for the attack," he thought with frustration. "Why couldn't this kid be a prodigy like Itachi and master several jutsus to make my life easier?" Kosuke lamented, discouraged.

"What can I do? I can't remember any powerful technique or jutsu that I can learn quickly, well there is the Rasengan but before I try to learn it I need to improve my chakra control, and even then I'm not sure if I'll be able to master it in time for the attack.

Still, there is a way, albeit uncertain. Now I can't even be considered a Genin, but if it works, it could quickly raise my strength to the Chunin level. Awakening the clan's kekkei genkai, the Shikotsumyaku" Kosuke thought.

A taijutsu ability that allows the user to manipulate and control the growth of their own bone structure. "However, awakening it will not be easy. Kimimaro was the only one in the anime known to have such an ability. Although I believe I have a good chance, especially because my appearance is similar to his, which may indicate a purer lineage within the clan, I at least hope it is an indication of this.

But the question is how to awaken the Shikotsumyaku? It may happen naturally, but I cannot afford to rely on luck. Perhaps I can stimulate awakening with intense physical training, since it is a taijutsu kekkei genkai, this is the only way I can see to accelerate the process. In any case, strengthening my physique will certainly not be useless," he thought as he walked out of the room.

As he left, Kosuke noticed the silence that permeated the house, an echo of loneliness. "Since my mother's death, I have only lived with my father, Yuji Kaguya, but he seems to be absent, probably on some mission, which works in my favor, since I prefer to avoid unnecessary interactions, as I cannot guarantee that he will not notice anything different about me," he thought, glancing at the clock on the wall. "It's 7:00 a.m. Clan training starts soon, and I can't be late; the punishments would be severe," he reflected, hurrying towards the training field.