You both were past lovers, but needed to break up because of family rivalry

Once you both even tried to kill each other as teens, but seven years passed after that

You earned your position as a leader and were send to a business trip. You walked inside the plain and searched for the number of your seat. Yet you shock, once you see a familiar face

“You’ve got to be kidding me…”

Blade speaks in a annoyed and irritated tone, as he shocks too. But even worse… you have to sit next to him