Chapter 1: The Ancient Power

(Kamen Rider Kuuga is own by Toei and Naruto is own by Kishimoto Masashi, the characters don't belong to me) P/s: this crossover Naruto story takes place in Alternate Universe.

Rock Lee, the shinobi of ninja that only use taijutsu in the battle. He is the type of person who keeps training to become a stronger and hope to defeat his two rivals, Neji and Naruto. But, fate sometime has a plan for our hard-work shinobi….

In one mission, where his team investigate the massacre by unknown massacre at the remote village, they have close encounter with the monster. That monster is called Grongi. The monster origins is unknown but that's where Lee got the power, the ancient power that grongi has create, The Arcle. In the form of belt, he can transform the user into the armored warrior call Kuuga, that's happen to Lee. That time, Tenten is about to get killed when suddenly, Lee, with the instinct, steal the belt from grongi's vault, and use it to become Kuuga. Lee manage to destroy the grongi with the simple kick, similar to his 'Dynamic Entry'. His foot is on fire his team saw it. That event happen before Naruto become Hokage and after he saves Hinata from Toneri.

The 5 great Elemental Nation now face with the new problem, Grongi. The researcher from 5 elemental nation has join forces to research the origin of the Grongi. So far, they only got to name them with numbers. First off, #01 is the grongi that Lee killed on the remote village where his team been sent to investigate. #02 is the Bat grongi who got away on the same night that Lee killed #01. Until now, they encounter #20, which Lee destroy him. They encounter #20 so far but Lee destroyed 5 of them, which leave them, 15 Grongi but without a doubt, in the future…more of them will appear.