Four "ordinary" girls, because of their pity and love for girls, and because one of them, Jingyu, had read a book called "Rose Maiden Pavilion", used this as a template to open a store called The Covenant on the Other Side. Their colorful lives and unique experiences unfolded here. What will happen between them and the humans or non-humans they are attracted to? What will those unexpected friends bring to them? This article borrows some of the characters from "Rose Maiden Pavilion", and it is a time-travel novel with various high-sounding reasons. The main point of this article is the perspective of the fish.