Fiona, a nobleman's daughter longing for freedom, avows to carry out her duty as Gile-sama's lover with utmost precision. Trapped in an undesirable betrothal, Fiona seeks an escape and serendipitously encounters Giles, another aristocrat grappling with identical issues. With a predetermined expiration date, Fiona embarks upon a destined expedition of amour. This path assures a regal love affair for Fiona.