Konoha :

In the most famous building in Konoha, an old man sat there smoking and was staring out of the window. He was known as the God of Shinobi and was also the third Hokage. Behind him was a table full of papers, which needed his signature. He, however, continued to stare out of the window at the 4th Hokage's monument. Today was exactly a year since Konoha had to face the Nine Tails assault. Hiruzen finally let out a sigh.

Konoha suffered the most losses of any village in the 3rd great ninja war due to having to fight every village. And merely a year later, they had to face another assault which not only killed the 4th Hokage, but also a lot of their ninjas and civilians. This not only increased the burden on him and the existing ninjas but also caused Konoha's orphanage to be overpopulated. Hiruzen sighed again, finally starting his day by getting that damned paperwork done.

In one such orphanage, Kenzo Inazuma, a 5 year old orphan, was sound asleep. Suddenly, however, he got up, screaming in pain while holding his head and falling unconscious. The scream woke up his fellow orphans, who alerted the caretaker.

A few hours later, Kenzo woke up, still under an intense headache, thinking 'Damn, what's up with this headache! While I did stay up late at night working on that project, I never suffered such a bad headache. And it feels like my memory is all jumbled up.'

Slowly he opened his eyes and looked around. Frowning upon noticing the unfamiliar surroundings, 'What is this? This is not my room. Where am I?'

He tried getting up, but suddenly noticed, 'Why am I so much smaller?' He turned to his side to see a mirror. What he saw in the mirror horrified him. There, in his place, was a child.

Suddenly, his thoughts were broken by two kids rushing into his room. They suddenly ran towards him and one asked, "Kenzo, are you alright?"

Whereas the other one asked, "Why did you yell?"

He saw them, thinking 'Who are these two? Wait, I know them. But how? Damn this headache is unbearable. And I need to get my thoughts sorted out somehow.'

With that, Kenzo pretended to fall unconscious again, trying to make some sense of the situation. The two kids then got worried and ran back to the caretaker for help.

While he pretended to be asleep, he started to gain access to new memories. Memories of Inazuma Kenzo. It took five hours of gaining clarity, an insufferable headache, and disbelief for him to understand, 'Fuck! I transmigrated! And into the Naruto world of all places! But how? I don't even remember dying. Don't you need to die to transmigrate? Why did this happen to me, I transmigrated from that safe world with rules and regulations into this deadly world full of cunning and powerful ninjas. And I got transmigrated into a fucking civilian of all people!'

After a few minutes of disbelief and ranting, he finally calmed down and decided to understand and plan his future. He thought, 'Alright, I guess I'll be known as Inazuma Kenzo from now on. What an unlucky fellow to lose his life to someone transmigrating into him. I wonder how that even works!'

Anyways, I got a lot of information from his memories. His parents seemed to have died in Kurama's rampage and he was incredibly lucky to live. After being admitted into the orphanage, he was examined by Root to see if he could be taken in.

'Lucky me, they didn't think I was good enough.'

'Hmm, since Kurama's attack took place a year ago, and since I am 5 years old, that means that I am four years older than Naruto and his generation. Alright, that gives me enough time to train and gain power. The Uchiha massacre should occur after around 7 years, the Konoha crush after 12 years, and Pain's attack and 4th great ninja war after 16 years.'

'Wait, what's this feeling?'

At that moment, he felt a weird energy flowing through him. He thought, 'Is this what chakra feels like? His memories didn't have anything related to chakra. So does it mean that chakra was unlocked when I transmigrated into him?'

Finally, some good news. With this, getting into the ninja academy should be easier than other civilians. Though I wonder how my chakra level compares to the chakra level of others. Anyways, probably better to get a look at the surroundings first to understand more of this place.'

After completing his analysis, he finally stopped pretending to be asleep and woke up.