RoOT/Route of Odd Taxi is a spin-off manga to the Odd Taxi anime series. Taking place at the same time as the events of Odd Taxi, two detectives from the Ibusuki Detective Agency (IDA), Rena and Sato, are tasked to investigate whether a banker's having an affair. But when a yakuza gangster named Dobu steals the evidence, the two are forced to take up another job when Harada Taeko wants them to tail Hiroshi Odokawa and find out the extent of his involvement with the missing girl in Nerima.