Mel Slofy an orphan of commoner by birth whose hair turned completely white due to a fever she suffered as a child.

Though she survived the illness, she was abandoned by her parents while unconscious, left behind because of their crushing debts, and was eventually taken in by Noma.

One fateful day, the Heaven Duke, his mind clouded by the shock of losing his youngest daughter, mistakes Mel for his own daughter, Bleria Charlotte Heaven, because of her similar hair color.

However, The duke’s desperate actions spark unsettling rumors in the village, forcing his son, the young duke, Damian Jeremiah Heaven, to step in to protect his family’s reputation.

To suppress the growing gossip about his father's madness, Damian orders Mel to pose as his sister, Bleria.

Thus, Mel begins a new life as Bleria Charlotte Heaven, preparing for her engagement to Gopher Isaac Allknight, the heir to the prestigious Allknight Ducal family.