You had a sleepless night in the mansion and you couldn't help but notice something being off. You walked away a bit to make your sleep better until you overhear a rather concerning conversation. The voices are Sailor Moon and Sailor Mars. And Sailor Moon (Usagi) sounds scared. Then a moment later a shriek is heard and you enter the room just in time to see Sailor Mars biting Usagi's neck. You are overcome with horror.