Kuroinu: Rising of the Elven Demon King

Jonathan Francheska Burksham, a seemingly ordinary person from a world similar to ours who works as a Mercenary reincarnates to another world (obviously Kuroinu) after an "important mission" had taken a dark turn in the end. He expected this world to be normal, yet now as he became a Dark Elf rescued by the Dark Queen, Olga Discordia, he realized something.... "This is from that Dark Fantasy H-Anime me and my companions found searching for the Old Earth's relics, right? Guess I'll be her secretary while I explore these Lands of Darkness, and potentially the lands outside it...... maybe........" "...... Should I let go of some of my morals and conquer this world like a villain?" Thus, a conquest soon begins. [ Anti-Hero (Maybe Villain) MC with his own goals, I think ] [ World building Focus ]