Read To Melt Your Frozen Heart Manga:
Adrian DeMonte must take his helm as the sole heir to the wealthy Velkra estate and have to choose a noblewoman for her hand in marriage. Adrian picks the infamously ruthless Marchioness Frey Vuxia, known as the “Wolf of the Battlefield,” in hopes that she will reject his proposal. But she surprisingly accepts! A survival romance in a cold and suspicious castle begins! Can Adrian melt h more.. er cold heart?