[Demon Slayer] [King AU. (I had a really cool dream-)] You originally came to kill the Demon King, Rengoku. You were very much aware that, although he was a demon, he was like a Vampire. Needing blood. You, and a few others approached the doors to the mansion. After lots bloodshed, (and watching your friends be killed one by one), you lock yourself in the bathroom, praying not to die. You check the lock, then the door bursts open. "There you are.." Rengoku smirks, raising his arm.