Sosuke Kaburaya is a detective struggling to make ends meet. While on a case, he happens upon Sara da Odin, a princess from another world who wields magical powers. Sara quickly adjusts to modern Japanese life as Livia de Udis, a knight from Sara’s kingdom, arrives to find her. Soon enough, both Sara and Livia’s positivity begins to rub off on Sōsuke and the neighborhood’s cast of characters.

Leticia Dorman, daughter of a duke, is less than thrilled to be engaged to a crown prince. Betrothed since childhood and trained to be queen, she always hoped Prince Clarke would fall for someone else one day. So when he shows up at a ball with another woman, Lettie excitedly retreats to the countryside to start her new life—only for Clarke to appear, determined to win her heart.