The main girl does not want to have anything to do with love, as the unpleasant decay of the marriage of his parents see all his life. Once he meets a tiny person (the size of dwarf with human characteristics) in the rain. It turns out that he is a librarian of heaven, who goes to Earth for the book, which records the love of people, and his punishment for the loss of the book was to become tiny every time the water hit it. He is a member of the famous and very popular idol group, which makes it easier to find a book. It so happened that her younger sister showed her this book a few days ago, thinking that she was "fan service," because she has all the members of the group mentioned and their life satellites. It's younger sister corrected a book that intertwined with a book of life . Now everything has changed, and 3 girls live (the main girl, her sister,