For those who do not know what omorashi is:
https://en.wikipedia.org/wiki/OmorashiOmorashi is a Japanese term (literally meaning "to wet oneself") that refers to a fetish or subculture focused on the feeling, anticipation, or visual depiction of having a full bladder, urinary desperation, or accidentally wetting oneself.
It's not the same as watersports, but the desperation of needing to pee and ultimately wetting ones self.
Or if you know any models who cater for this niche that offer private shows.