Babel Mirror

She has three identities, three reincarnations, her past is a mystery, and her future is unclear. He has a confused life experience, is widely scorned, has a miserable past, and has a bumpy road ahead. In this seemingly peaceful demon world, what kind of waves will he and she make? Will that so-called prophecy come true? Her: "No matter what you want to do, I will help you do it." Him: "I just want you to stay by my side."