Idol Sister.

Platinum Kiss is a new idol group that consists of three girls: Takano Ayaka, Kamii Maki, and Ooizumi Maina. Ayaka's older brother is their manager. He's also a huge pervert! When he goes missing before a big live event, however, they all feel really uneasy. By the time he's found, there's less than an hour before they go out... but he's got just the solution to make everyone feel a lot better!