Kayo Akizuki, whom Saki Kurusu admired, has disappeared.She was trembling with her anger, but she was shocked when she learned that her father was involved in the development of Yagami's ●things.To her cruelty, she is administered the ●thing her father developed, and the tremendous female instincts that have been hidden until now are being dragged out.Her righteous heart to challenge her criminals and her sad desire to know the truth about her father are intertwined.She is devoured by the dark side that lurks within humans.