Karei naru Kuwadate

Sophia, the daughter of the Earl of Yardley, has always been different than her social peers. Much to the concern of her parents and peers, Sophia would rather give up her noble lineage and marry a man she loves instead of an empty-headed aristocrat. Then one day, Ben, the Duke of Sharnbrook, saves her from danger. Ben is charmed by her immediately and sets out to try to win her hand. However, he soon finds that Sophia has a distaste for aristocratic men, so he hatches a plan to pose as a groom and find work in her household. The two soon grow close, but Ben's false identity, not to mention the interest of other suiters, soon puts their relationship and Ben in danger. (Source: Renta!)