Since you are a demon master, what you should do is to eliminate demons.
At the age of thirteen, she was burdened with the fate of slaying demons.
But he has no ability to slay demons at all. Since he is a weakling, how could he stay in the demon-controlling clan because he was expelled from the family early?
It turns out...
Everything was already doomed, it was just a scam.
And the person she approached who gave her warmth turned out to be the last...
BOSS.