Itsuki is a novelist and �modern day Pygmalion� who works day in and day out to create the ultimate younger sister. He�s surrounded by various other characters: a beautiful genius writer who loves him, his big-sisterly classmate from college, a fellow male writer, a sadistic tax accountant, and his editor. They�re all looked after by Itsuki�s perfect younger step-brother, Chihiro, who has a serious secret.