The stoy of an Elf Queen who got isekai'd from her world into our. Her name is Lady Elfinn, our titular queen. And her caretaker, a freelancer who believes in elf supremacy. His name is Isuzu. In order to help her accomplish her desired goal: To become the ruler of our world, he proposes her... To become the Queen of S.M!? What awaits them in the future!?