>>94172255Honestly, it depends on who's dominant in the relationship and how far into piss stuff you go.
You can go the omorashi route of desperation with seeing how long Shiori can do her fast food shift without needing a bathroom break, or even depriving her of a break completely during rush hours to make her as submissive and dependent as possible, or possibly having to be escorted to the potty every time she needs to pee. At that point, it's a game of control where you're in control of a basic bodily function of hers that she's learned to control since being a toddler, but now she's technically lost that control and is helpless when she starts dribbling in her panties after you told her she can't use the bathroom until she's served another half dozen tables.
On the other side, you can use it in a more direct scenario where you're submissive to her and she can freely push you into being her personal toilet as you'll experience a golden shower, but you have to remember that she's being kind enough to do this to you or else she wouldn't bother with you in the first place, putting you in that position where this is all you'll get from her but you should be happy that she even gives you a piddle of golden attention in the first place. You can also flip it around since I know sometimes it's hot to imagine Shiori getting roughed up a bit, so there's the humiliation of urinating on her to treat her like a lowly whore who's no better than a toilet as the golden shower makes the mascara run down her face. Personally, I'm not too much into self-insert stuff, so imagine, uh... I guess Nerissa having a dominant bone in her body for once and pissing on Shiori~n, even if I imagine she'd want to be the one enjoying a fresh glass of Shio-piss.
And then back to the first part since it came to mind while typing all of this out, there's the fun shame of her needing to pee while attempting to assassinate someone, and it comes down to using the bathroom or getting her last shot at killing her target. So, even as she's blowing someone's brains out, Shiori will be blushing as the front of her panties grow warm and wet, knowing it was the best option.