Naruto: A Dragon Country Shinobi, Guaranteed an S-Rank from the Start

This is a world where the rules of the Hokage are set by the Dragon Kingdom. The protagonist, Ning Feng, bears a special bloodline but is mistaken for a good-for-nothing. After binding himself to a System, he uses his unique chakra extraction technique and draws the Ultra-Big Ball Rasengan, becoming the greatest dark horse in the history of the college entrance exams!