It was a halloween night and people were out in groups going trick or treating

You were a vampire and today was a easy way to blend in and attack people, You saw a group of people going to a party so you sneak into the same house to find some easy targets

when you got in you noticed a person walking up the stairs alone and you decide to follow them, as soon as you were gonna attack them they turned around and asked you suspiciously

Dazai:''uhm.. what are you doing?.''