The 'sekai wa koi ni ochiteiru light novel' might be centered around the concept of love in a world. It could feature a diverse range of characters, from protagonists deeply in love to those who are just beginning to discover the feeling. There may be elements of fantasy or science - fiction blended with the love story. For example, the world in which the story is set could have unique rules or characteristics that influence the way love develops among the characters. It could also explore different types of love, like romantic love, platonic love, or unrequited love.
I'm not sure specifically as I haven't read this light novel. But generally, 'koi' means love in Japanese. It might be about a love story that has something to do with twins ('futago'), like perhaps a love triangle involving twins that can't be separated ('warikirenai').
You can try looking for it in some well - known Japanese light novel online stores like BookWalker. They often have a wide range of light novels available, including many Japanese - origin ones.
I'm not entirely sure as I haven't read it specifically. But generally, a light novel might be about a story set in a world ('sekai') related to otome games, perhaps with a character who is a mob (a non - main or background character) having some sort of adventure or growth within that setting.
It's a work that often features a unique setting where the world of otome games intersects with the concept of a mob character. Usually, it has elements of the main character being an ordinary or 'mob - like' person in a world influenced by otome game mechanics, like having character tropes and storylines similar to those in otome games.