Marrying My Sister's Husband

Yu-Jin was murdered by her husband Chan-Yeong and his mistress Na Ju-Hui. Shortly after, her sister Yu-Ri is also killed and finds herself back in time before Yujin and Chan-Yeong's wedding. Determined to avenge her sister, Yu-Ri decides to marry Chan-Yeong. Just then, her first love Tae-O reappears before her.