@vodkavodka
>Quite enjoyable wall of text.
I'm actually quite happy with that appraisal, thanks, ahah.
Anyway, in case of WN/LN I'd say it's pretty much clear that there was no sex that night, since it's kinda ridiculous to imagine Hajime and Yue doing it with Shia nearby, in the very same room. If Yue was so open about it, she wouldn't try to procure a room for just her and Hajime in the first place. It's been pointed out that he ended up sleeping sandwiched between them. And
if she were to join, it'd be a
very-very huge deal, and no matter how lazy the author would be, he'd point it out. Shia, with how in heat she is, wouldn't act like normal in the next scene. In the end, we're talking about a guy that spent 1/4-1/3 of the previous volume describing sex.
The thing about 'whatever happens between you and Shia' is exactly what is says on the tin. But it's not her allowing it, it's her saying that even
if something were to happen, she's confident that Hajime would be her nonetheless. She'd be quite sad nonetheless, and even Hajime himself mentions at some point that reacting to Shia would make Yue sad and he doesn't want to hurt her.
As for the manga, while not clearly stated, the overall tone and build-up really point in that direction, that is, that they had sex after it. With all that kicking out Shia, sitting on the bed, holding hands and slowly pulling their lips together. The fade-out into the night is there to show that the action transitioned into the night. I'd say it's very suggestive, and probably every reader could guess what happened. As a bonus, seeing that they're not really nervous about it, it shows that it's not their first time doing something like this, just that we, as readers, weren't in the loop.
Actually, that was a really outstanding move. Taking manga separately, in retrospective, one could only guess since when they started having
that kind of relationship. I've seen people deducing that they had been having sex as far as since chapter 10. Also this way mangaka kinda kicks the WN's haremness in the balls, huh. Intrigued how he will handle the following parts regarding this topic.