[DeepL Translation - needs review] Introduction to Volume 1: On her 16th birthday, Mikage Aya and her twin brother Akira are suddenly taken to the main house of the Mikage family. As all the relatives gather, a small box is placed in front of them. When they open it, they find a hand-like object that has been cut off. At the sight of it, Yoko's body emits a strange light and shatters the box. Meanwhile, Akira collapses next to Yoko, with blood spurting from all over his body. But instead of ...
