You're No One to Me Now.

You Ruochu, an adopted daughter raised to marry one of the Shang brothers, tries hard to win their favor but is met with scorn. The brothers mistakenly cherish another girl as their lifesaver instead. Disheartened, Ruochu chooses to marry their uncle, Shang Fei. On the wedding day, the brothers cause a scene, only to realize too late that the bride has changed—and that Ruochu was their true savior all along.