Merchandise
The Adventure of Etoile Rosenqueen from Marl Kingdom is an "audio book" that chronicles the rivalry between Cornet and Etoile in between the first and second games which was released in 2006. Tenpei Sato composed the music for it and it was only released in Japan.
RosenQueen.com, named after Etoile Rosenqueen from the Marl games, was an online division of NIS America that sells various games and merchandise concerning the NIS games. In late 2010, however, they closed down RosenQueen, and made the merchandise shop a generic part of the NIS site.
The series also has calendars, soundtracks, phone cards, novels, comics, and plushies.
Read more about this topic: Marl Kingdom