My theory is that purexclusivium itself isn't what determines when someone is a virgin. I think it could be up to the individual person's interpretation. For example, if Cheong believes virginity only lasts until penetration then she would have a negative reaction. But if Liban's interpretation...
I think the author forgot that the title of this manga was "Loner Life In Another World." This MC has more friends than any isekai manga I think I've ever read.
If this chapter is any indication of the quality we can expect to see going forward then we have absolutely nothing to worry about. You guys did a great job. Thank you for picking up the torch.