Love Celeb

From ShoujoMagic:
Shinjo Mayu's newest leading lady is an idol, and the leading man is... a future prime minister!? Just what is a "Love Celeb"? Nakazono Kirara is an aspiring starlet. She used to think she'd do whatever it took to get a starring role in a drama and have a CD. But her manager, Hanamaki, proves her wrong when he sends her into a room full of horny producers to sleep her way into a role! Kirara wants no part of it! She's a virgin, and these guys are scary!! Especially the silver-haired one named Gin... He seems to be in charge. But he lets Kirara leave the party with her virginity and his phone number, and it seems like nothing lost, nothing gained... until Kirara is suddenly the most famous new starlet for no apparent reason!?

Side story in volume 7: Darenimo Ienai!
Ruka’s a junior high student in love with her father’s assistant, Fumi-sempai. She wants to become an adult quickly because everyone sees her as a little kid! But what would happen if she actually became an adult with the help of a time machine?