Crossover: The Strongest Uchiha, the Ninja World is in Turmoil!

Kawasaki was originally a high school student in the 21st century.
I love life, I love watching anime like Naruto and Bleach, and I also love swimming with beautiful women.
Several years ago, he made a promise with his aunt, who was a few years older than him, to go swimming at the beach together.
Unexpectedly, a tsunami struck, and he disappeared.
When Kawasaki woke up, he found himself in this Naruto world that was both unfamiliar and familiar to him.
Moreover, he was a member of the Uchiha clan.
Since he's already here, Kawasaki has no choice but to survive in this world.
Several years later, Kawasaki finally managed to get a position as an acting elder.
"bite!!"
Kawasaki finally heard the system's clear and pleasant voice as he had hoped.