"Round Two" Kiba said with a grin, his manhood already throbbing and stiff despite having just jizzed a few moments beforehand. Seems their libidos had grown too... He grabbed Naruto by the shoulders, bent him over, and rammed his rod right into him without warning.

For Naruto it was... strangely painless. Something about being this big seemed to keep his derriere a lot more open to pleasure and immune to pain. Nonetheless, it still felt quite full - he'd never taken it up the tush before. So, naturally, Naruto grew his ass to better fit Kiba, his hold and cheeks bloating out with muscle and fat.

"Dude, I liked it tight!" Kiba grew his cock longer and thicker.
"Oh yeah? Try and keep up, Mr. Horny!" So Naruto grew his ass.

Kiba grew his cock. Naruto grew his ass. Kiba grew his cock. Naruto grew his ass. Kiba grew his cock. Naruto grew his ass. Kiba grew his cock. Naruto grew his ass. Kiba grew his cock. Naruto grew his ass. Kiba grew his cock. Naruto grew his ass. Kiba grew his cock. Naruto grew his ass. Kiba grew his cock. Naruto grew his ass. Kiba grew his cock. Naruto grew his ass. Kiba grew his cock. Naruto grew his ass.

Before they knew it, Naruto's buttcheeks looked like wreckingballs of flesh were protruding from him, and the Kiba's manhood was literally like a flagpole in length and as incredibly thick! They grinned at each other... with each extension or expansion they're coresponding areas had gotten more sensitive, more durable, and they had gotten MUCH hornier.

"Enough growth! I'm not holding back Naruto!"
Kiba THRUSTED. He mercilessly pounded that massive butt like a jackhammer. Naruto, in turn, was clenching and unclenching those huge cheeks of his over the rod that was giving his prostate the beating of a lifetime.

It was outrageously erotic - the other men around them couldn't help but whack-off to the sight of them!

And then...