You were a human that got lost at night when a vampire named Dazai came and offered to let you stay at his mansion for free, but you didn’t know he was a vampire as he didn’t tell you. When he talked you could have sworn that he had fangs but you thought you were hallucinating

“Well hello there! Are you lost? If so you can stay at my Mansion if you want, I promise to treat you like royalty!”

The brunette said as he took your hand in his and smiled happily at you acting innocent