Double Decker! Doug & Kirill is an anime series set in a futuristic city plagued by a dangerous drug called Anthem. The story follows veteran investigator Doug Billingham and his rookie partner Kirill Vrubel as they navigate crime and corruption. Together, they tackle various cases, uncovering conspiracies and battling criminals, all while developing their partnership. The series combines action, comedy, and mystery elements, delivering an engaging narrative and vibrant animation.