Chūnin Exam on Fire! Naruto vs. Konohamaru!

is the ninth Naruto OVA. This OVA aired in movie theatres along with the movie Naruto 5: Blood Prison.

Synopsis
Konohamaru and Naruto both participate in the Chūnin Exams in Sunagakure. Konohamaru and his team begin in the area set for the Second Exam where they are attacked by a monster. Naruto saves them from it and they all make it to the preliminary matches where Naruto is matched up with Konohamaru. Konohamaru starts off by throwing a smoke bomb and then uses Big Ball Rasengan, a technique that Naruto hadn't taught him before. Naruto is able to narrowly avoid it. Then, both of them use the Multiple Shadow Clone Technique and attack each other, Naruto with Rasengan and Konohamaru with kunai. Naruto's clones easily defeat Konohamaru's. Konohamaru is beaten down but gets back up. He then continuously attacks Naruto, only to be beaten and bruised. Then, he uses the Shuriken Shadow Clone Technique which forces Naruto to jump up. Using Fire Release: Ash Pile Burning, he creates an opening to hit Naruto. After he hits Naruto, he cheers, believing that he had won. Naruto then gets up with his Sage Mode activated. It is then revealed that senjutsu is against the rules of the Chūnin Exam, making Konohamaru the winner. In the end, it is shown that Konohamaru has become a chūnin, declaring Naruto as his subordinate.