H e l p M e P l e a s e

Does anybody know the name of a shoujo manga where the main character is a girl, and she gets “adopted” by her close friend, cousin, etc which is a boy (don’t remember)?The girl is the author of a cell phone novel thingie, and the boy reads it, not knowing that the author is her. He thinks that the author is his coworker because he read the name of the author wrong, and the coworker is also a fan of the girl. In the end, the boy ends up with the girl (not the coworker). Btw: there is quite a gap in the boy and the girl’s ages. And I think that in the story, the coworker pretends to be the author. (I forgot whether that agreed to do it or she was just a bish)