Regalia: The Three Sacred Stars is an original anime series produced by Actas. The story revolves around sisters Yui and Rena and their involvement with the mysterious Regalia, mecha-like machines that play a central role in the fate of their world. As political tensions rise, the sisters must uncover the truth behind the Regalia and their connection to them. The series blends elements of science fiction and fantasy, offering a narrative filled with action and intrigue.