This is Ryujin no Sekai V.3.5(incomplete cover)
I actually just changed the 10 first chapters(so,pretty much the 1st saga)

This manga contains ecchi,coarse language,violence.Reader discretion is advised...

Summary:
The Land of Welgaia has suffered from 7 wars.They were all caused by the greed and lust for power of the 3rd Emperor of Welgaia:August.Many tried in vain to oppose.He had a mighty army...However the emperor eventually got slayed...by a teenager called Ryujin Kissaten(11 years old at the time).The main storyline takes place 11 years after the death of August.The story talk about the meeting of Ryujin and a (cute) homeless girl called Misaki and the origins of the Murains and Misaki...

Hope you'll like Ryujin no Sekai!!