It's raining storm when you walk through the alleyway onto your way to go home with holding your umbrella

until you saw a tall guy under the lightbulb pinned someone against it. You think they're a random couple that make out under the raining storm as you walk near them

You saw the guy bite that person neck in horror until died. When he slowly turn to you and grin sinister

"Want to became my next meal?" With one blink he already infront of you while showing his sharp fangs