The Red Dragon Emperor from Douluo Continent

An ordinary person, an unknown system, and a god-killing tool powered by longing descends on the world of martial spirits in Douluo Continent, what will happen to the waves?
Douluo Continent 1 (Gou Plot) - High School of Demons DXD Part 2 - God Killer - Guilty Crown - Sword Art Online uw - Fate/Zero - Saint Seiya Pluto Myth LC - DXD Part [-] - Douluo Continent [-] Peerless Tang Sect - Dou The Legend of Luo's God Realm...
PS This book is slow and hot, it will not depend on the system, and it will not be arrogant.