The city state of Lisvalletta. Two suns rise above this city, and the people here live peaceful lives, but in the shadows crime and illegal drugs run rampant. Among them is the dangerous, highly lethal drug "Anthem" which casts a dark shadow over the city. The SEVEN-O Special Crime Investigation Unit specializes in cracking down on Anthem. This unit operates in two man "buddy" teams in what's called the "Double Decker System" to tackle the problem. Doug Billingham is a seasoned investigator, and joining him is Kirill Vrubel, whose abilities are mysterious and unknown. 

(Source: Crunchyroll) 

The first episode was distributed online through Bandai Channel and Crunchyroll on September 3, 2018. TV broadcast begins September 30, 2018.

Episode 1 - Howl at the Two Suns!

Episode 2 - Farewell, Detective Okappa!

Episode 3 - Your Rival Is Your Partner's Partner!

Episode 4 - Derick Returns!

Episode 5 - A. Kroyd Killer!

Episode 6 - Up Close and Personal! 24 Hours with the Lisvalletta Police!

Episode 7 - Revenge Is Mine!

Episode 8 - Dancing! Academy Investigation!

Episode 9 - Don't Think, Feel So Good!

Episode 10 - Failed Detective, but Pure!

Episode 11 - SEVEN-O Dies Twice!

Episode 12 - The Detective’s In Danger!

Episode 13 - And Then There Were None

The Daily Lives of the Seven Detectives!

Infernal Unfair!

Detective Buzz-Cut and the Steamy Murder Mystery Case!

Sunrise

DOUBLE DECKER! DOUG & KIRILL