The Demon King cannot be defeated.
Even with all of my father's power, which was close to that of a god, it wasn't enough to defeat him.
My father was an "outsider", a person summoned from another world with extraordinary powers to defeat the Demon King.
But in fact it wasn't enough. Even though my father had practiced to death, it was all in vain.
Because the Demon King, had a power that surpassed even the power of the Gods who ruled this world.
The wind was blowing hard, blowing the leaves off the trees. I, Himeno Murasaki, in front of the tombstone bearing my father's inscription, I made a vow.
"With the katana I hold in my right hand, with the scabbard around my waist, and with the spirit you passed on to me,"
I stuck my katana into the ground and held it tightly with both hands,
"With the strong determination you gave me, I will complete your responsibility, father."
Under the blue sky. In front of my father's gravestone, and in front of the katana sword that I stuck and held tightly, I made a vow.
And thus, my story begins.