Doki Massacre or Doki Curse is the name given to an event where the 4 Dokis: Monika, Sayori, Yuri and Natsuki were humiliated, murdered and tortured by the serial killer Caio Henrique, who has already killed more than 3 million bodies. How was this possible? The Crow Reaper a.k.a. "Ceifeiro do Corvo" opened a portal called Black Void, which allows anime characters to exist in the real world, or for someone from real life to go to an anime world or vice versa. This was the initial intention... but later, Crow changed the purpose of the portal, and this portal nowadays currently allows anime characters or other fictional characters to access the Shadow Universe through the Black Void, but in the case of the Dokis, they were not very lucky, like everyone else, since only the strong and prepared survive in the Shadow Universe or other similar universes created and organized by Zero, Oblivion, Crow Reaper, etc. Called "irritating, impertinent and sensitive drama queens" by Caio Henrique, he harbored a hatred to the point of murdering them with a hatred that scares many, and fascinates others. But every now and then, Corvo resurrects the Dokis and brings them to the Shadow Universe again—only for them to be killed or tortured again. Most of the time, and in other adjacent universes, they have no luck. When asked why he keeps resurrecting them only for them to be killed again, Corvo replied: "It's fun to kill the Dokis and see their reactions. It's a kind of morbid entertainment that's satisfying as a hobby... Or maybe, even more than a hobby. Yes, you can call it a curse... that's the right word... the curse. It's satisfying to kill the Dokis, but you could never get enough. And about Caio, he was like a pioneer of this. He was the first one to decide to kill the Dokis at a time when everyone was finding them cute, adorable, and stuff like that, when in fact, they're far from it."