The game is based on a popular cell phone title called Kyaba Jo Pi where players manage a hostess club to entertain VIPs, some of them being characters from series like Lupin III. However, the 3DS title was renamed as such to reduce the game's ties with the hostess profession. Level-5 CEO Akihiro Hino, who will also be the game's executive producer, said that people might be against the idea of playing a game billed as a hostess simulator. Hino also stated that the game's core development staff is female.
Players control a custom avatar who has to work as a Neosienne in a grand lounge-slash-nightclub called the Castle in the town of Neo Ginza. A Neosienne (a possible portmanteau between "Neo" and the "-sienne" in "Parisienne") entertain clients by talking to them, getting them to order food, and showing them a fun time be it idols, politicians, and CEOs. The game will use the 3DS' Spot Pass system that lets you exchange digital business cards with other players and have their customized Neosienne in another player's Castle nightclub. Players can spend their nightclub earnings by buying new clothes and furniture for their custom home in Neo Ginza.