"Whatever causes night in our souls may leave stars." The story is not mine

What happens when a normal anime fan gets transported to her favorite childhood anime? Ryu the keeper of worlds took an interest on her and chose her to travel to dimensions, but she has the keeper of death chasing after her, what will she do? She meets many other keepers and discovers things that are beyond any human's knowledge. Join in the mystery and adventure! Various! fandoms x reader (I suck at writing descriptions ＞﹏＜)