Rules!

Sitting in the archives, Shinji quietly flipped through a book explaining the principles of chakra.

The original author of this book he was perusing was the Second Hokage, and it detailed the principles of how the human body refined chakra, as well as various ways to utilize chakra.

Naturally, Shinji found such substantive material fascinating.

Moreover, based on his understanding of chakra and Medical Ninjutsu, he suspected that much of the data in this book had been obtained by the Second through human experiments.

Of course.

Human experimentation did not necessarily mean it was inherently evil, because the test subjects could be prisoners, prisoners of war, or even corpses.

Under the current moral system of the Shinobi World, as long as one did not target their own people, basically no one would pursue the matter.

Suddenly, a deliberately suppressed, hurried set of footsteps reached Shinji's ears.

As it turned out, a Ninja Academy student walked into the archives with an excited look on his face, leaned close to the ear of a familiar friend, and whispered, "Sasuke Uchiha is squaring off against the ninjas from Kumogakure. Do you want to go check it out?"

That Ninja Academy student, who had originally been looking up information in the archives, quickly closed his book and nodded repeatedly, "Of course I have to go see such a good show!"

When the surrounding students reading various books heard this, they also grew interested, packed up their things, and left the archives along with the two of them.

"Heh."

Shinji could not help but chuckle.

Because he had cultivated the Twelve Palaces, his sensory faculties were sharper and clearer than before. Even though those people were inside the archives and had intentionally lowered their volume while speaking, he still clearly heard the content of their