Niehime to Kemono no Ou Spin-off: Shiro Usagi to Kemono no Ouji

Happily ever afters only truly happen in fairy tales—so while Leonhart and Sariphi's story has come to a close, their son, Richard's, has only just begun. With a foot in both the Yoana and Ozmargo, and an important coming-of-age ceremony on the horizon, he sets off on a journey to prepare himself physically and spiritually...
(Source: Yen Press)
Note: Includes nine extra chapters.