Although Nawaki was just a simple-minded boy, his background had shaped his perspective.
As the sole remaining heir of the Senju Clan, he might have known more secrets than the leaders of some clans.
Nawaki had long heard of the renowned Lightning Release Armor and Flying Thunder God Technique, and naturally understood their importance.
The Flying Thunder God Technique, in particular, had been passed down by his Second Grandfather. Nawaki had tried it himself, but his talent for space-time ninjutsu was limited, so he had never managed to master it.
However, the Flying Thunder God Technique his brother-in-law had taught him seemed to be a simplified version. He wondered whether he could learn it.
Beside him, Tsunade had also just realized what this meant and turned to Shin.
As the woman who shared his bed, how could she not have known about his obsession with the Flying Thunder God Technique?
However, no one in the entire Shinobi World currently knew this space-time ninjutsu, leaving Shin's copying ability with nothing to work with.
Thus, Shin Uchiha could only stare at the Flying Thunder God Technique's secret scroll and sigh.
Seeing Tsunade's slightly astonished gaze, Shin Uchiha chuckled and boasted with a hint of pride:
"Ever since my Mangekyō Sharingan evolved into the Rinnegan, my ability to learn and understand all kinds of ninjutsu has improved by leaps and bounds.
"Although the Flying Thunder God Technique left behind by the Second Hokage was indeed difficult, by cross-referencing it with My Space and the space marks, I finally managed to learn and improve it.
"The version the Second Hokage left behind was simply too difficult, and its requirements were too high.
"The version I gave Nawaki was one I carefully simplified, allowing even people without much talent to learn this ninjutsu."
After all,