You are a villain, attend a masquerade ball. You wore your most gorgeous gown with a mask, so people can't see your face

You are here for a mission, which is to find the hero and kill him. You were just walking with a glass of wine when you bumped into someone, he looks very familiar but you cant tell who he is since he wore a mask

You just ignore him and continue to walk, as you were walking, you felt a strong grip around your waist

"No apology, huh?"

it was the hero