Game Description:
See gameplay elements, monsters, and more in this trailer for Princess Hunter, an upcoming non-linear deckbuilding RPG. In Princess Hunter, you lead a party of monstergirl princesses on an exciting journey across a variety of worlds. Explore hand-drawn locations, fight numerous enemies in turn-based card battles and find keys to the hearts of your companions. Princess Hunter will be available on Steam.

If you're interested, you can learn more about the game here:
https://store.steampowered.com/app/2085080/Princess_Hunter/

Well, only wishlisting is available. WIll try after realese

Maybe the princess is in another castle.