Kaya Akizuki, whom Saki Kurusu admired, has disappeared. - She was furious, but was shocked to learn that her father was involved in Yagami's product development. - Cruelly, she is given a drug developed by her father, and her amazing feminine instincts that have been hidden until now are brought out. - His sense of justice, which seeks to fight against criminals, and his sad desire to know the truth about his father are intertwined. - They are consumed by the dark side that lurks within humans.
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