Complex sentence: After entering the house, Kiba rushed the door to the room Kurenai was held hostage in and engulfed by genjutsu flames, Naruto quickly extinguishes Kiba with his jacket.
Split into simpler sentences: After entering the house, Kiba rushed the door to the room Kurenai was held hostage in. Being engulfed by genjutsu flames, Naruto quickly extinguishes Kiba with his jacket.