"Rasengan!"
"Chidori!"
"Sasuke!!!"
"Naruto!!!"
Boom! In the blink of an eye, more than half a month had passed.
With his cheat-powered abilities, Shu had successfully helped Naruto and Sasuke master their signature techniques.
Meanwhile, in the original story, Jiraiya had spent two years teaching Naruto nothing but the Big Ball Rasengan.
What kind of mediocre teacher was that?
Pfft! He could go sit at the same table as Rayleigh next door!
Of course, that was just a joke. Kakashi had been right about one thing: Naruto's fundamentals were appallingly bad. He didn't even understand basic ninjutsu knowledge. Saying he had started from scratch wouldn't have been an exaggeration.
Jiraiya did deserve some credit for managing to teach Naruto the Rasengan.
Shu had taken the crash-course approach. He first taught Naruto the Multiple Shadow Clone Technique, then let two hundred shadow clones brute-force their way through the training together.
Nine-Tails chakra had leaked out a few times during the process. Shu had gone straight into the seal's inner space, found the Nine-Tails, and, without a word, punched him right in the head—
hard!
Unlike the other Uchiha who coveted his power, Shu neither wanted his power nor bore him any ill will. But he didn't waste words on him, either.
One glare from his Rinnegan, and he launched straight into a beating. No ninjutsu, just a good old fucking thrashing!
Every leak earned another beating, until the Nine-Tails was practically numb!
The worst part was that the bastard hit ridiculously hard!
One punch took off half his health bar!
Who could take that?
Then, before leaving one time, Shu casually gave his head a couple of pats and said, "Behave yourself. Maybe one day I'll be in a good enough mood to let you out."
The Nine-Tails chose to believe him.