Tenshi Ja Nai!!

Tenshi Ja Nai!! (天使じゃない!!, lit. "I'm no Angel!!") is a manga series written and illustrated by Takako Shigematsu. The manga was published in North America by Go! Comi from October 2005 to September 2007.

Plot
In the play of life, all Hikaru Takabayashi wanted was to be part of the scenery. Tormented by jealous schoolmates ever since she appeared in a famous commercial in grade-school, Hikaru transfers to a prestigious all-girls' academy where she hopes to settle down to a quiet life of anonymity. But when her new roommate turns out to be the super-popular TV idol Izumi Kido, Hikaru finds herself thrown smack in the spotlight's glare once more!

And as if living with a celebrity wasn't bad enough, Hikaru discovers that there's more to Izumi than her "good girl" image—she's a he! And this is only the first of Izumi's many dangerous secrets! Now Hikaru's the unwilling star player in a madcap tale of deception, abduction, humiliation and blackmail... you know—the usual romantic stuff.