Hime-sama no Shitto de Youjo ni Sareta Danshaku Reijou desu: Hakkin no Kishi-sama kara no Kyuukon!?

Within the echoing halls of the royal castle, Berna lives a quiet life as a maid, finding a rare and comforting friendship in Dietrich, the prince's strikingly beautiful guard. Their simple, candid exchanges are a small solace in Berna's otherwise routine existence. But her world is turned upside down when a royal decree dictates that Dietrich must marry the princess of a neighboring kingdom, a woman infamous for her rumored dabbling in dark and dubious magic. Tasked with serving at the engagement party, Berna steels herself to support her friend, even as her heart quietly aches. However, the celebration is shattered the moment the princess arrives. Wielding her forbidden arts, she casts a spell before the entire assembly, compelling Dietrich to publicly declare his love to the one his heart truly desires. As a stunned Berna works to ensure the disastrous proposal proceeds smoothly, she is rendered utterly speechless when Dietrich kneels before her and offers his hand instead. Consumed by a jealous rage, the spurned princess unleashes a powerful curse upon Berna, warping her body into that of a small child. Now trapped in a youthful form with the mind of an adult, Berna must navigate the chaos of a kingdom in turmoil. The handsome knight who chose her is now her only protector, but their path forward is fraught with peril. This is the beginning of a tumultuous love story between a commoner girl and a peerless knight, bound together by a shocking proposal and a magical transformation that will test their bond in ways neither could have ever imagined.