The Sister's [ YulSic FF ]

Kang Eun-Ha and her younger sister, Kang Eun-Hye falls inlove with the same man named, Oh JiHoon but little didn't Eun-Hye knows that she's marrying the man, is her sister's EX-Husband. As years past, Eun-Hye was able to know the truth, and began to desperately takes Jihoon from her sister. But a twist befalls the two sisters. What could this be?