Midori Oka

After graduating from detective school, Achao and Entaro received their certificates and launched a private detective agency. One night, while investigating Otoyo, the wife of a soba shop owner, the two went to the basement of a theater and unexpectedly stumbled upon the murder of model Ranko Nemoto. Using the earring she was wearing as a clue, they began their investigation.

The sixth and final "Otora-san" feature.