"Sakura Taisen: New York NY." is an anime series set in the "Sakura Taisen" universe, expanding the franchise's narrative to New York City in the 1920s. The story revolves around the New York Combat Revue, a group of performers who double as defenders of the city against supernatural threats. The Combat Revue operates under the guise of the Little Lip Theater, a popular Broadway theater, and its members pilot steam-powered mechs called "Koubu" to combat demonic forces.

The protagonist, Shinjiro Taiga, is a young Japanese man who travels to New York to join the Combat Revue. As the newest recruit, Shinjiro must adapt to the team's dynamics and prove his worth. The team includes Gemini Sunrise, a cheerful and determined Texan cowgirl; Subaru Kujo, a reserved and disciplined swordswoman; Diana Caprice, a sophisticated and elegant actress; Rikaritta Aries, a passionate and fiery performer; and Cheiron Archer, a mysterious and enigmatic sharpshooter. Each member brings unique skills and personalities to the group, contributing to their effectiveness in battle and their camaraderie off the battlefield.

The narrative explores the challenges faced by the New York Combat Revue as they confront a series of demonic incursions threatening the city. These threats are orchestrated by a shadowy organization with ties to the supernatural, forcing the team to uncover the truth behind the attacks while balancing their public lives as performers. The series delves into themes of teamwork, identity, and the clash between tradition and modernity, as the characters navigate their dual roles as entertainers and warriors.

Throughout the story, Shinjiro's growth as a leader and his relationships with the other members of the Combat Revue are central to the plot. His interactions with Gemini, in particular, highlight the cultural differences between Japan and America, as well as the mutual respect and understanding that develops between them. The series also incorporates elements of romance, humor, and drama, blending action-packed mech battles with moments of character-driven storytelling.

"Sakura Taisen: New York NY." maintains the franchise's signature blend of historical fiction, steampunk aesthetics, and supernatural elements, offering a fresh perspective on the "Sakura Taisen" universe while staying true to its core themes and narrative style. The series provides a self-contained story that appeals to both longtime fans and newcomers, with a focus on the unique dynamics of the New York Combat Revue and their mission to protect the city.