Nemesis: The Mystery of the Golden Spiral

Set two years after the drama series "Nemesis," Kazama Naoki works for Nemesis Detective Agency and is regarded as a brilliant detective. He is able to solve the most difficult of cases, but he has a secret. His secret is that he is actually a lousy detective and he relies on the genius skills of his assistant Mikami Anna to solve cases. Their partnership continues.
(Source: AsianWiki)