How can one start writing a '15 items or less fanfic'?

First, decide what the 15 items are going to be. It could be 15 words to describe the setting, or 15 actions for the characters. Then, just start writing a simple plot around those items.

To start writing a '15 items or less fanfic', you need to figure out the core of your story. Decide if the 15 items will be related to the characters, like 15 traits or 15 pieces of clothing. Once you've determined that, create a basic storyline. For example, if your 15 items are 15 emotions, build a story where the characters' actions are driven by those emotions in a limited and focused way.

Begin by choosing a theme for your '15 items or less fanfic'. Let's say you're writing a fanfic for a popular TV show. Decide if your 15 items will be related to the show's iconic locations, props, or character quirks. Then, make an outline. If your 15 items are 15 locations, plan how the characters will move from one location to another in a logical and interesting way. You can start with a simple introduction that sets the stage and gradually introduce the items as the story progresses. Also, keep in mind that you need to be concise and make every item count in the story. Don't waste words on unnecessary details, but rather focus on building a engaging narrative within the limitations of the 15 items.