Both star eccentric geniues that are no affilated with the detectives professional, but help them solve cases. Ataru centers more general cases instead of cases with weather elements.
Both dramas share a common theme centered around meteorology and the lives of individuals working in that field. They explore the professional and personal lives of meteorologists, the impact of their work on solving mysteries and the interpersonal relationships among colleagues within their workplace.
Other than both starting with the letter O, both dramas deal with the dead, whether or not it is trying to fulfill last wishes or solving murders. In relation to the characters, both have headstrong protagonist female leads also stringing the male protagonists (with vastly different personalities) along.