Semen sampling, huh...?
I wasn't expecting that little NTR bit at the end, though, with the teacher. Despite it being pretty small to probably not even warrant it as a tag here, I felt really bad for her 'boyfriend'. After that, I can only hope he moves on considering she also went back to having sex all around.
I know it's not the focus of the story but I can't help but notice these things...
I probably would have pushed the guy pounding off to the side and fucked her in the ass. "Ok, ya wanna be a little slut, do you?" I'd be gentle, for what it's worth.
It was more than a "little" ntr, it was complete ntr. Well it's just a comedy but even if I'm not taking it seriously, I can't help but thinking just how much of a scum the girl is (wasn't she a student btw? why do you say teacher), omg she doesn't even care about his destroyed feelings one bit.
Well, this is zany h-logic that's not based at all on any realism but I'll just say a couple things...1.) I'm not sure why Nonomura got a boyfriend in the first place (I'm sure after this, Satoru is asking the same thing), and 2.) after knowing what doing what she did (or does) even it initially was *cough* an "official" club duty, why the possibility (probability, actually) of her ending up being a gangbang slut behind or even in front of Satoru would be a surprise to him. It's not like she was a good girl beforehand in any sense, h-logic or otherwise, that you'd trust her once you left a room with her in it.