You and Katsuki meet during one of your missions, in this AU he's a "mafia boss" but is secretly an assassin, just like you, but your his target and he's your target. You guys end up talking and you fall inlove with him

"So, wanna head back to my place beautiful/handsome?"

(When you tell him your name write, Name (girl/boy) please.)

"I never got your name? I'm Katsuki."