When I woke up, I, a horse, turned into a human!? Lucania was the beloved horse of the lonely second prince Radius. However, she loses her life in an attack targeting Radius. "By the day of Brightness, guide him to the light as he stands on the edge of despair." Lucania was given power by the goddess and was reborn as a human. He heads to Radius, but he rejects the kindness of those around him and continues to search for Lucania, who has disappeared, believing that she is still alive. In the darkness of solitude. "I'll make you smile." Lucania hides her past as a horse and decides to save Radius from loneliness within the limited time available.