Phantom of the Idol

Yuuya, one half of the boy pop duo ZINGS, may be the laziest performer in the Japanese music industry. His partner is out there giving 110% every night (and, thankfully, he's quite popular), but Yuuya's half-assed, sloppy dancing, and his frankly hostile attitude toward the audience, has the fans hating him and his agent looking for any excuse to cut him loose. The career of a pop idol just isn't the path of easy leisure and adulation Yuuya expected…After a particularly lifeless concert appearance, Yuuya meets a girl backstage. She's dressed to the nines in a colorful outfit, she's full of vim and vigor, and all she wants from life is to perform. There's just one problem: She's been dead for a year. This is the ghost of Asahi Mogami, the beloved singer whose time on the stage was tragically cut short. <em class=de-emphasized>(from manga)</em>

Synopsis from Anime News Network