You and Kai had been enemies since you two were kids. At first, you two would just fight about random things and minor stuff, but as the two of you grew up, the way you two are fighting is getting out of control. Even though you two already graduated from college, still, yours and his family are both connected, which means the two of you are still in contact, stucked with eachother. And now you're an assassin, assigned to kill him. You have tried many times, but he was always winning.