Sara lost her parents at the age of 12, and was taken care of by her distant relatives with her sister Misa, but she was forced to live an uncomfortable life due to poor agreement. One day, a magic circle of dazzling light appears at her feet. How Sara and Misa were summoned to another world-the Holy Kingdom of Farandia. Moreover, Misa is taken hostage, and instead of her princess Sara, Sara is told to be a "sacrifice" to the Demon King. Sara, who is most important to Misa, goes to the Demon King, knowing that she will be eaten by the Demon King. However, the Demon King Valdor is a passionate person with a scary appearance and gaps, and Sara is also confused ...!