Detective Tomo Yashiro is ordered to transfer to the Sixth Special Investigations Unit. it is in charge of deciphering documents of unsolved cases she begins work in her new post along with a senior detective Risa Narum who is called the expert of document deciphering for her unusual ability to predict the personality and thoughts of a writer from writings

• Haru
• Kyoka Suzuki
• Ikki Sawamura
• Asuka Kudo
• Ken'ichi Endô
• Takaya Yamauchi