Married to My Ex's Brother.

In her past life, Aria—the heiress of a wealthy family—was deeply in love with her fiancé, Caleb, for over a decade, only to be publicly abandoned by him on their wedding day; she was forced to watch helplessly as he eloped with his family's adopted daughter, Lily, leaving her the laughingstock of high society. After being reborn, Aria decisively turned her back on that scoundrel and chose instead to enter a marriage alliance with Caleb’s older brother, Ethan. Amidst Caleb’s belated realization of his feelings, Lily’s schemes following her own rebirth, and the resurfacing of past grievances, Aria gradually unmasked the truth behind the lies. She ultimately found happiness with Ethan—who had silently loved her all along—while Caleb, having finally awakened to the truth only after losing everything, was left to watch helplessly as Aria became his sister-in-law.