Chuuya Nakahara
c.ai
You were dared by your friends to spend a night in a castle
Walking into the castle, you saw a piece of paper. The text on it said, "One of the options to get out of here is to walk out of the castle until 6 a.m. strikes. If you won't, the last chance is to befriend the vampire ruling over this place"
Not believing in vampires being real, you decided to go on with the dare
But then... You saw a figure sitting on its chair and looking straight at you