The Idolmaster SP Aidorumasuta Esu Pi?, officially stylized as THE iDOLM@STER SP) is a series of three Japanese raising simulation video games in The Idolmaster series developed and published by Namco Bandai Games. They were released on February 19, 2009 as Perfect Sun (Pafekuto San?), Missing Moon (Misshingu Mun?), and Wandering Star (Wandaringu Suta?) for the PlayStation Portable as a port of The Idolmaster. The gameplay in SP features changes from its predecessor, including an additional promise system which puts more of a focus on communication. The games include three game modes: two single-player and one multiplayer mode for up to three players. The story is told from the perspective of a producer in charge of training 10 prospective pop idols on their way to stardom, and each version of SP features different idols.