Turns himself into a girl.

"Well Tenten," Naruto smiled as Tenten wheezed and the other two girls backed away. "There was one other thing I wanted to try... I'm curious as to what sex is like from the other side of things," he said, taking out and opening the Note, before writing, "Naruto Uzumaki has the ability to swap physical gender at will. Whenever he changes himself to a female form, he will look like the female version of himself envisioned in his Sexy Jutsu."

He then put the Note down and told Akemi and Okyo not to touch it. Then he stripped naked, making Tenten blush and look intently. Once he was naked, he stretched out , giving her a good look at his well built figure.

Then, she blinked as she saw him change. His hair started growing as his face became more feminine, and his hips widened, while his waist and muscles shrunk. His chest began to expand, his pecs changing themselves out for fat deposits, and his nipples became more perky.

All the while, his dick shrunk and retracted into his body, and a pussy opened up. Naruto, now physically a girl, but still very much identifying as male, shook his new hair out. "Whew, so this is how girls feel huh?" he asked, looking down at his boobs. "...yeah, the chest feels kinda heavy, that could lead to back issues later on... No wonder Tsunade became a medic, she probably wanted to treat her own soreness..."

He looked at Tenten, who was blushing furiously and looking Naruto over.