Konyakusha no Uwaki Genba wo Michatta node Hajimari no Kane ga Narimashita

Sophelia Lotus is the epitome of nobility and grace, tirelessly pouring herself into her royal duties as fiancée to the crown prince. In her short fifteen years of life, she had learned, above all else, to endure. Unfortunately, however, her fiancée wasn't quite so noble—a fact Sophelia learns firsthand when she catches him half-naked with her very own sister! Running to Sophelia's aid is none other than Livionis, a knight of the kingdom who has long been secretly in love with her. Captivating the forlorn Sophelia at first sight, Livionis invites her to flee the kingdom and run away with him. Making up her mind in an instant, Sophelia takes Livionis's hand and leaves behind the only life she'd ever known. Concealing her past and taking on a new identity as "Sophie," she tumbles headfirst into a riveting romance with Livionis. Venturing into the unknown wilderness of an uncertain future, just where will this young duo find themselves as new love rings? (Source: J-Novel Club)