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]