The Demon king of the renowned swordsmanship family

I wanted to live in form. Although abandoned by their parents, Even if you go through a gutter-like slum, I wanted to live my life. From the common poor who studied hard, He rose to the rank of Grand Duke of the Seven Horses of the Empire, the first of the seven towers of the Empire. And from one day on, the world will be a one-man corps, He was called the Demon King. Is there. “Holy Virgin, I… Have you lived in form?” “Yes, you’ve lived better than anyone else. I’ll vouch for it.” Before saving the world and dying, the saint recognized this demon king. What better life could there be than this? By the way? Apparently I’m It seems that he was reborn as the youngest child of a certain swordsmanship master. I have a family that I didn’t have. I have a colleague I can trust. Then I’ll give it a try here again Shouldn’t you be alive?