Akuyaku Reijou? Iie, Gokuaku Reijou desu wa

Rosalia is known in secret as a "heinous young noble lady" and is restricted to living within the Marquis' estate. She tells her grandfather that she has fallen in love with a knight named Kadeo, who entered the garden. She uses this as a reason to escape her confined life inside the residence, though it is unclear whether her feelings are genuine or simply a means to an end.