From Enemy to the Heart

The series

Jet is a handsome man forced to become a hired gunman because of his dark past and problems. And one day, he is hired to kill a woman. It was suppose to be a simple job, however, it is complicated by the fact that his target, Sophita, is his ex-girlfriend's sister. This leaves him with only two options. To either protect Sophita or to kill her. What will he choose?