Erotic Twin Killers - The Seduction of the Sisters (2016)

Sinopsis

Face the complicated relationship! Tae-kyeong's first love Chae-bin promises to marry wealthy Seok-dae but Seok-dae is actually in a relationship with his assistant... Then one day, Seok-dae's assistant Eun-soo comes around to Tae-kyeong who is in despair! However, Eun-soo looks so much like Hee-soo who Tae-kyeong thought she'd killed.