Yume-san is a hot script writer with laid-back demeanor and a chain smoking habit. The heroine is just a high school girl. Don't let the 10 year age difference bothers you. Yuki matures as the story goes by.

After their parents died, Yuki's brother took a job at a gay bar to support her. When he fell in love (with a woman), Yuki wants to be independent as soon as possible so that her brother can have a real family of his own. She approached Yume-san, her brother's acquaintance, and ask him to hire her as his assistant.