Hoegwihan Eonniga Nae Yakhonjareul Tamnaenda
My Sister Covets My Fiancé·회귀한 언니가 내 약혼자를 탐낸다
A woman named Neris is engaged to a Duke against her will, but upon arriving at his estate, she finds her sister already present, claiming the Duke as her own. As the Duke becomes interested in Neris, she learns that her sister has come back from the past with the intent to take everything, including the man she is betrothed to.