The Engagement of Marielle Clarac (Manga) Volume 3 by Haruka Momo

How do you find a bride fit for a prince? That's the problem on ferocious fangirl Marielle's mind as she's tasked with warning him away from any ill-suited matches. His romantic misadventures lead to a wintry countryside vacation filled with intrigue, family drama, and heartache - not to mention the return of a familiar face Marielle would rather have never seen again! Will Marielle and the ever-serious Simeon unravel the mysteries surrounding House Montagnier?