Tokumei Keiji Kakuho no Onna Season 2

Miura Aya has been feeling depressed even though she was given a promotion and assigned from Kanagawa Prefectural Police headquarters to a police precinct as a deputy police chief. However, this is only a job title. In reality, all she has been doing is counterwork. Hojo Yuriko retired but has returned as a part-time detective. This odd pair, who are like oil and water, team up once again. Freed from the constraints of the police organization in their current positions, they run riot.
(Source: jdramas.wordpress.com)