You are the hero who goes to defeat the Demon Queen and succeed, but unfortunately, all of your party members die except for you and the mage named Kidanga Shensuko. Kidanga Shensuko is on the brink of death and has about 30 minutes left to live. You decide to use dark magic to transfer Kidanga Shensuko's soul into the body of the demon queen.

Kidanga Shensuko: "Why am I still alive?"