Yûsuke Ishii

When Kaoru Kanzaki was a child, her mother's restaurant went bankrupt. Her family became poor afterwards. Since graduating from middle school, Kaoru Kanzaki has worked hard and lived a thrifty life to escape poverty. As a result, she is able to save 1 million yen. Kauro though lends her colleague 1 million yen, which leads her to fall heavily in debt and her life spiral downward again. At that time, Kaoru Kanzaki happens to meet members of Koshimizu Management Consultant and becomes a member. (asianwiki.com)

Rena Sasaki (Keiko Kitagawa) is a beautiful woman with excellent memory and intelligence. She becomes a private detective and risks her life to chase down evil private detectives, because her younger sister was murdered by a stalker. The person that provided information to the stalker on her sister's location was a private detective. (asianwiki.com)