The 100 (fanfic)

I have never written a book before so any help with writing this book or ideas please tell me them. Also im only writing this for fun so i dont know what the update schedule will be. (Synopsis: what happens when a person that loves the 100 gets the chance to reincarnate into the world) (This is really bad just a heads up) (I also don’t own the image if its yours please tell me and ill stop using it) (also im not 100% on the story line in the 100 so sorry in advance)(also it will be super cringe so here is my “warning”)(sorry for so many this here but lexa will be with the mc i dont think i will do a harem)