At first glance Haruse Kiina is a completely normal 29-year-old. However, Kiina is the head of a special investigation unit nicknamed "Beppan" which deals with strange cases. With an unorthodox approach to solving crimes, she draws on her exceptional memory and powers of observation, and gets so absorbed in the pursuit of these cases that she forgets to eat or sleep til she solves the mystery.

Kimi Hannin Janai yo ne? ~ Aren't you a Criminal?Kanjiya Shihori as Morita Sakura

Kaname Jun as Udagawa Kyosei

Morita Sakura is a peculiar "freeter" (freelance part-timer) who dreams of becoming a mystery novel writer. While switching between various jobs throughout the series, she also becomes an assistant to Officer Udagawa, a detective who discovers her excellent memory and reasoning skills. On the other hand, Udagawa (who has just joined the police ranks through his father's connections) is fairly inept and has a tendency to fall in love with female suspects.