The Secret of the Friendly Duke

Noel—the adopted anthropomorphic daughter of the Miceria family—is abused and neglected by everyone after her mother passes away from an accident. Alone and grief-stricken, her only source of comfort is her secret wizard friend Sion.
But when Noel accidentally hears about her step-father's horrific plan, she begs Sion to help her escape the Miceria household. Turns out that Sion is a magical duke who can easily get rid of people in the blink of an eye!
Sion then offers Noel to work for him as his assistant. Is this an offer of a lifetime, or a trap? What is Sion planning to do with Noel?