It’s been 25 years since I found myself reincarnated in another world. I’m a traveler by profession, otherwise known as unemployed. While I was wandering around, trying to enjoy fantasy from top to bottom, I encountered an injured dragon girl. As she looked at me, the image of the Demon Lord from the smartphone game I had played in my previous life came back to my mind. She is a powerful opponent who is a great enemy of humankind, a brave man pulls out his sword and confronts the demon lord to get rid of it. …But. In front of me, there is a girl whose clan was destroyed by humans and struggled to survive even if it became tattered. At this rate, her destination is the two characters of ruin.