"N-Naruto... y-you can't do this."
Kakashi sat cross-legged on the ground with his back to Naruto, his eyes tightly shut.
"If Sasuke finds out..."
At those words, Naruto's previously normal expression darkened.
Still, Naruto was busy finding the right spot.
His palm slid easily past Kakashi's shoulder, then slipped beneath an elastic strap that looked suspiciously like something else.
"Found it."
Once he found the right spot, chakra immediately appeared on Naruto's palm.
Kakashi felt a cool sensation on his back.
He was very worried that this hand would start wandering wherever it pleased.
Fortunately, once that cool sensation sank into his skin, the hand quickly withdrew from his collar.
"All done, Kakashi-sensei. I've left my own unique Flying Thunder God Mark on your back."
Naruto walked around to face Kakashi, about to remind him not to let anyone else see the Flying Thunder God Mark.
But when he reached the front, Naruto discovered that Kakashi's ears, neck, and cheeks were burning red.
"What's wrong, Kakashi-sensei? Are you feeling uncomfortable?"
At that moment, Kakashi felt that he might as well have let Naruto kill him earlier.
"Comfortable... comfortable, my ass!!"
As expected of an avid reader, the moment he opened his mouth, his words went straight into overdrive.
"So you've read too many of Lord Jiraiya's timeless classics and couldn't help connecting this to one of their famous scenes?"
Just now, Kakashi had thought...
He had thought Naruto was about to do something utterly disgraceful to his teacher right here.
Only now did Naruto begin to catch on.
"Heh, Kakashi-sensei, the Pervy Sage's timeless classics really have corrupted you."
At that, Kakashi covered his face with both hands as quick as lightning, stubbornly denying it. "What nonsense are you talking about? What timeless classics?"
"Naruto, I don't even know what