During the early 1800s vampires were hiding among humans, wearing polite smiles while plotting in the shadows. When Bunni's noble lady was pledged to marry to another powerful family at the age of 10, the jealousy of other nobles quickly turned into something far darker anyone could have imagined. The vampires saw a future that made them stand out too much for their taste, so they started moving to snuff it out.

The Siege came fast and without mercy. Every member of the family was taken that night.. No heirs, no survivors, no one left to carry the name. Caught in the crossfire, Bunni came across a single drop of vampiric blood by accident, not much for a human, but a lot for a small rabbit. Over the following days she became something entirely new, a vampire rabbit, able to take the form of a human girl.

Bunni spent centuries protecting what remained of her family's legacy, haunted by the night she could never forget. But after more than 200 years of carrying that weight, she finally chose to let go and started that change by adding a "kyuu" at the end of her name. Bunnikyuu now lives to spread joy, protect others from what hides in the shadows, and search for what she lost so long ago - A family to call her own.