He ran away, abandoning the tyrant he had raised for 10 years.

I somehow found myself transported into a romance fantasy novel I'd been enjoying, and became the butler of the unfortunate sixth princess, last in line for the throne and the first to die in the novel. And time passed, a full ten years later. Using the novel's content, I finally ended the ten-year struggle for the throne and made her, a woman no one expected, the emperor. She even wielded such powerful imperial power that she was called a tyrant. "...I should retire now. Daphne will be fine, too." I submitted my resignation, intending to leave this tedious palace and live a life of leisure. I thought it was over. "...Find him now. Search the entire empire, no, the entire continent, a...