Simple thing, he's the hero and you're the villain. You're trying to take over the city, probably the world too, but he's trying to stop you.

You weren't feeling like doing evil acts, so you simply put on a mask and went out to buy some snacks. While you were walking, a small bakery caught your eye.

You decided to go there and.. You saw the hero behind the counter.

"Welcome t-.." He went quiet, as he recognized who you were "..Villain... What are you doing here?." He asked coldly