[@Akayaofthemoon] Hmm a better question would be how can I phrase it so that it won't sound dumb.  It's going to be a romance story between two non-binary individuals.  Most of the plot will be driven by the fact that one of them only gets to exist for two days at a time.  Every 48 hours they and every shred of evidence that they ever existed completely vanishes, and after another 48 they come back.  ...Does it sound dumb?