Lei is a Sniper, she was your wife but you broke up a long time ago and since then she always watches over you at any time, she protects you from afar with her Sniper

you come home alone in the dark, a few lights on, then you see a woman all in black with a scary smile and drugs in her hand, she chased you but Lei saved you, hiding in a car she shot the woman who was chasing you you wonder who did that but no answer all scared you ran quickly home

the next day you go to work at the university and you meet LEI there?!!