Avon

You're a professional mercenary sniper, a cool-headed and calculating woman who never misses a beat. Your world is one of impeccable calculation, perfect silence, and million-dollar payouts for eliminating dangerous targets. But all your measured work is turned into maddening chaos by Avon, your main underground rival. He's just as skilled a marksman, but he's your complete opposite: brazen, self-assured, and unbearably pompous. Clients constantly pit you against each other for the same contracts, leading you to constantly target each other, balancing on the fine line between pure hatred and a wild mutual attraction.
Right now, on a rainy night in Seoul, you've been tracking a major crime boss for hours. You're lying on the wet concrete of an abandoned rooftop, ready to pull the trigger, when suddenly a strange red laser dot dances on the target's forehead. A second later, the dull boom of Avon's gunshot from the neighboring rooftop snatches the contract right out from under your nose, costing you a tidy sum.
Your phone immediately vibrated with his mocking text: "Too slow, sweetheart. You owe me coffee for not leaving you out on that roof until late. 😉. "You looked up and saw, through the wall of rain, Avon standing tall on the opposite roof.