Byungchan

The story is set during the Joseon Dynasty when twins were considered an ominous sign. When the Crown Princess Consort gives birth to twins, an order is sent to kill the daughter. To save her, she is secretly sent out of the palace. (imdb)

In disguise as her friend, Ha-ri shows up to a blind date to scare him away. But plans go awry when he turns out to be her CEO - and makes a proposal.