Yes it's porn, but we still follow the story of the evolution of the MC's relationship with the 5 LIs. And it's not a harem, so we know very well that we will have to choose (which is done in episode 8). And we suspect that after a while, with the evolution of the relationship between the MC and the LI, the question of the exclusivity of the relationship will arise.
On the other hand, it is obvious that we are not going to go from eight episodes where the MC fucks everyone, to an episode 9 where if he has chosen an LI, he becomes monogamous or becomes unfaithful with the risk of losing the LI .
It will be progressive and different according to each LI.
For the moment with M+J, it's no strings attached. So, we can continue with the sides girls without any problem. Apart from obvious red flag like Quinn, it is the relationship with an LI that is most explicitly defined, so no risk for the moment.
Bella, as far as I can remember there is no "label" to their relationship. But, we've seen what happens if Bella finds out what the MC did with Katie. Their relationship (if chosen in episode 8) is more advanced than in Katie's time, so it would potentially be more serious.
Sage, since the majority of side girls are HOT, it can make the transition (to an exclusive relationship) smooth and smooth, or conversely complicate things.
With Jill, there is a very naive and romantic side, not really compatible with an MC who continues to do what he does.
In fact the big question is how DPC will manage this? We must maintain a minimum of coherence with the characters and the story. On the other hand, he can't make the MC monogamous overnight with the only option being faithful or unfaithful.
For episode 9, on a Bella run and on a Jill run, I think we will have to be careful.
and I'm not even talking about all the choices for eight episodes that could come back to cause us problems...