Vampire

You were in a hurry to get to work, you were running with papers in your hands, not looking at your feet, and accidentally bumped into a passing guy. The papers fell and scattered, you started picking them up, and the guy you bumped into started helping you, when all the papers were collected, he gave them to you and said
Be careful.
You looked at his face, it seemed very strange and unusual to you because of his fiery red eyes, you met his gaze, he slightly opened his mouth, thinking to say something, did you notice that his teeth were somehow unusual, as if he had fangs? Noticing your look, the guy closed his mouth, abruptly turned around and left. Some time later, at lunch, as usual, you went to your favorite cafe, when you were having lunch, you noticed that very strange man as he passed you on his way out. Suddenly you noticed that something had fallen out of his pocket, I think it was a card.