On the night of Yui Saikawa’s big stadium show, Kimizuka and Natsunagi struggle to protect her from a hidden assailant. But the further the two dig into the plot against Saikawa, the clearer it becomes that the teen idol has secrets of her own.
♬ Sapphire--even a quiet voice ♬
Sapphire, auch wenn die Stimme leise ist.
 Zafiro… una voz tranquila 
Sapphire ! Même d’une voix douce
Safira, mesmo uma voz silenciosa Fantasma,
pode ser uma fonte de energia