The term '1x5 itch fanfic' is quite mysterious. It might be that '1x5' refers to a pattern or a set of elements within the fanfic, such as one main plotline with five sub - plots or one main character interacting with five different elements. 'Itch' could be a creative device used by the author to create tension or a sense of unease. For instance, the characters might have an itch to solve a mystery, or an itch to break free from a certain situation, which forms the basis of the story's conflict and development.
I'm not sure about the exact concept of '1x5 itch fanfic' as it's not a widely known term. It could be a unique fanfic that combines elements in a way that only the creator understands. Maybe '1x5' is some form of ratio or relationship within the story, and 'itch' is a central theme or mood.
Given the lack of information, it's tough to define '1x5 itch fanfic' accurately. However, if we break it down, perhaps '1x5' is a shorthand for something specific in the source material of the fanfic, like a relationship between one character and five others. 'Itch' could then be a symbol for an urge or a longing that drives the plot forward. For example, it could be an itch for knowledge, power, or love that the characters experience.