Sis, I Prepared a Billionaire Husband for You Ep. 7

She turned down an acceptance letter from an Ivy League university for her boyfriend, choosing instead to stay at the company as a janitor. But to her shock, her boyfriend proposed to the company's heiress. Devastated and heartbroken, her life takes an unexpected turn when her long-lost twin sister, the powerful figure behind a vast conglomerate, finds her and asks her to take her place for the purpose of handling business affairs, and entering into a marriage with a CEO......