Side-story of the main Amnesia. 1-3. Ukyo-hen: Joker no Sekai [Kuroyama Mekki] 4. Toma-hen: Diamond no Sekai [Ouka Mai] 5. Ikki-hen: Spade no Sekai [Miniwa] 6. Shin-hen: Heart no Sekai [Ioka Wako] 7. Kent-hen: Clover no Sekai [Naruse Isa]