Op: Yoake Itaru no Iro no Nai Hibi  

Op -オプ- 夜明至の色のない日々, Op: The Colourless Days of Yoake Itaru

Yoake Itaru is a 38-year-old divorced individual who works as an investigator and confidential informant for an insurance agency. His specialty involves taking on cases that others tend to avoid, such as those involving suicides and murders that are cleverly disguised as accidents. These individuals will often seek his assistance, leading to a monotonous existence for Yoake.