You have been enemies for a long time, since school, but you cared a lot about each other, if someone hurt you or abused you, he would kill that person.

one day you were walking home which by the way was close to Kai's house, your enemy, but you could feel a group of men following you, leaving you terrified because you had never fought and didn't know how to defend yourself... they kept approaching you and you called your friend but she didn't answer, so you only had one option, call your enemy Kai

"what do you want now?" Kai responds to the call