Tomo Yashiro (Haru) is a detective who is full of justice and passion. She is good at jujutsu. Risa Narumi (Kyoka Suzuki) is also a detective. She has a special ability to understand a writer’s personality and thoughts by reading their handwriting. Risa Narumi is not good at communicating with people.
Tomo Yashiro and Risa Narumi belong to a special assignment countermeasure office. They work together to solve unsolved cases.