Trying Something New

[mb78]

I like the hereditary curse option. For a setting suggestion, she just turned 18 and is at college. Her family has warned her it's coming (curse begins after 18th birthday), so it's not completely surprising, but it is her first transformation. Maybe something like the new moon rather than full moon as the trigger. Alternately, using the same college setting, first sexual experience triggers the curse (again, having been warned it's coming by her family but not really believing it).

But as always, your creative mind will likely come up with something better than I would!

As for narrative, while the actual transformation content is #1, a good buildup and setting (and characters who are defined) can really enhance the transformation content.