Hey, so I read these two a long time ago and I don't remember much.

1. FOUND: Backstage Prince
   He's a famous type of actor (I think historical movies or plays) and he meets a girl because she or he was chasing a cat. He makes her his assistant. He's kind of cold and possessive and mean with black hair I think.

2. FOUND: Kiken Junai D.N.A.
   This guy dresses up as a girl and is more popular then his sister. He does it to keep the guys away from her because he loves her but she's not actually his sister. She was taken in by the family when her parents died.

Thanks!