Any other ecchi/rom-com I wouldn't care to wonder about that bait, but that one is wild.
The main thing will be Honjou's reaction learning about the night.
But on what will actually happen, Ekoda might ask him to film her while she touches herself. Might be why she was shown here really enjoying how she looks filmed by him.
Which would be another 'betrayal' since that's his and Honjou's thing, while he wouldn't have touched her.
I find it refreshing how this manga goes the repressed Mormon/Christian way, doing anything sexual imaginable while not crossing a given line, when most mid ecchi rom-coms use bait and switch and every lame excuse possible to stop the heat.
Here a lot happens so it's not as frustrating to wait for them to realize their feelings. At least they're very in-touch with their horniness, that's half the battle