Himitsu no Hanazono

Kayo Tsukiyama is that kind of person who takes all your work you don't want to do yourself. Actually she is editor for a fashion magazin, but she is doing most of the work her younger coworkers should do instead of her own work. Nobody is really interested in her, so she has to celebrate her birthday all alone in her office.
When that fashion magazine is suspended she ends up at a manga publisher for girls comics. She is responsible for Yuriko Hanazono, who has a big secret: She doesn't exist, her mangas are produced by four excentric brothers...