[Mosaic removal] Eri, a Japanese language teacher who is about to marry a colleague teacher.Her fiancé begins to talk about her job change because her teacher doesn't pay.Eri, who likes to teach her, begins to feel a temperature difference with her fiancée.Meanwhile, the school clerk Ukai learns that he is a writer, and the relationship between the two deepens rapidly, but what Ukai was writing was an erotic novel.Eri is inspired by a novel written by her cormorant, using her as a model, and she gradually becomes bold like the hero of her story...