Secretary to the Lord of Chaos

He is my master, my work, my life, and my death. He is the Dragon of Chaos—his appearances are feared in all worlds. And I am his balance and his faithful secretary. Quiet, obedient, efficient. It seemed it would always be that way, but everything changed when I reached adulthood, and the dragon decided to add the functions of a mistress to my duties… One-volume novel. HE.