Dude's not even isekai'd and he's a lame depressed bundle of nerves.
Just create a party HR and report your relationship beforehand. I'm starting to think it's just an excuse for them to work out their hidden sex/danger kink.
Damnnnn! Both of them are thirsty as fuck, anyway i think the plot would be funny and less dramatic if the other members started to slowly noticing as time went on but choose to stay quite