The project is based on Red Dragon, the “role-playing fiction” story born from the “table talk role-playing game” sessions by five prominent anime, game, and art creators. The five Red Dragon participants were Gen Urobuchi (Phantom ~Requiem for the Phantom~, Puella Magi Madoka Magica, Fate/Zero), Kinoko Nasu (Kara no Kyokai – the Garden of sinners, Fate/stay night, Lunar Legend Tsukihime), Izuki Kogyoku (Mimizuku to Yoru no O, Mama, Garden Lost), Simadoriru (illustrator), and Ryohgo Narita (Baccano!, Durarara!!). Each participant created a character to guide through six nights of tabletop role-playing game sessions devised by “fiction master” Makoto Sanda (Rental Magica). The story takes place in the sparkling era year 3015, where the great nations Donatia and Kōran divide the world in a cold war as they fight for supremacy. In the middle of this standoff is island country Nil Kamui, which has lost its independence.
Source: Anime News Network