In an alternate world where Junko Enoshima never started the tragedy, never planned the mutual killing game of Hope's Peak 78th Class, the world leads a relatively normal life... Until two students, Ryouta Mitarai and Nagito Komaeda, give into despair and through some incredibly bizarre magic and time skipping event, invite twenty four of Hope's Peak's students, staff, even just locals to what they are told is a carnival...
However, that couldn't be further from the truth. The cast soon find themselves kidnapped and, not only transformed into fairytale beings, but also forced into a mutual killing game, where the only way to escape is by getting away with murder.
The roleplay ended in 2017 after the end of Chapter 2.
Warning: all spoilers are unmarked.
Marchen Karneval contains examples of:
- Anyone Can Die: In Chapter 1, four people alone die; Ibuki Mioda, Junko Enoshima, one of the Mukuro Ikusabas, and Chisa Yukizome.
- Big Bad: Ryouta Mitarai and Nagito Komaeda both are, given they planned this whole event.
- The Big Bad Wolf: Mondo is transformed into one, complete with sharp teeth, ears, and a tail. Hell, it's even in his title. He gets treated more as a giant puppy though, as instead of being afraid, most people either try to give him a bath or scratch him behind the ears.
- Coordinated Clothes: Played with; both Ryouta and Nagito have a Hansel and Gretel theme to them and, in turn, wear similar outfits. The participants are also forced to have the appearance of a character from a fairy tale associated with them.
- Cruel and Unusual Death:
- The very first death of the game- The Marvelous Musician, Ibuki Mioda. She wasn't even murdered; she activated her forbidden action of "Speaking about herself in the third person", which resulted in the poison flowing through her body and causing not only bleeding, but for the left side of her body to turn purple. If that wasn't enough, she was hung from a trapeze wire with a microphone cord around her wrists and dropped from the ceiling immediately after the rules of the game were announced. After her death, she's turned into a bizarre chimera with fox ears, horse legs, a rabbit paw, and a wolf paw, and forced to play music for the masterminds' for the rest of eternity.
- Chisa Yukizome's execution: she's stabbed, sliced, and has her bones broken by knives, paper, and books; is psychologically tormented with beings taking a crude form of Kyosuke Munakata; and is being watched by her students as all of this goes down.
- Hunk: Mondo was given a shirtless vest as part of his main outfit in order to show off his abundant muscles.
- Mood Whiplash: Everyone starts out having fun and enjoying themselves at a carnival apparently set up by two of the students of Hope's Peak Academy. Things soon go to hell after the 24 participants are knocked out in the Big Top.
- Odd Friendship: The hot-tempered Mondo with Only Sane Man Hajime, so much so that Mondo let Hajime give him a bath. Their quick friendship actually worked out in their favor, given that it gave both of them alibis for the first murder
- Oh, Crap!: Everyone's reactions after realizing that Nagito and Ryouta were telling the truth of this being a killing game.
- One Steve Limit: Completely averted. Doppelgangers of Mukuro Ikusaba, Sonia Nevermind, Celestia Ludenberg, and Mikan Tsumiki are present at the carnival, and they all play an incredibly vital role in the rules. This also includes The Kirigiri Sisters, who, even through using a sibling AU, are still subject to the doppelganger rules.
- Only Known by Their Nickname: Played with in regards to Daremo, the Ultimate Imposter, who currently was taking the form of Ryouta Mitarai. It seems that only the masterminds know Daremo's true name, and given that dopplegangers exist, it's entirely possible the participants will never know.