5+1
If you have several connected ideas that don't quite work as a regular multichap story but also don't quite feel like a series, a 5+1 style of fic might work for you.
In general, the fic is six chapters long (although you can format it however you'd like if that doesn't work for you). It chronicles 5 times that one thing happened and 1 time that something else happened instead.
For example: 5 times A and B didn't kiss... and one time they did.
It's an easily recognizable structure for many and it's a handy way for writers to get to "the good bits" without agonizing over transitions etc. in between. Each chapter hits with the power of a oneshot, but you still get the build up and release of a multichapter fic.
You don't have to follow the numbers exactly. 5+1 is just the most common format.
If you want some examples, check out the nearly 70K fics tagged with 5 Things (and synonyms). If you want to dig into the history, checkout the fanlore page.
