I feel as though the logic of this school and its competition is already nonexistent so it's not that crazy that it comes to this.The absolutely 0 interaction with even their own friends does come off as a bit too much to me, especially because they already did something a little similar with the partner swap arc, but I think it'd be pretty nice to see what all of them will get up to in their private time.
Anyways, the fact that Kon immediately tried to drop out of the marriage stream with Ui in mind is soo incredibly sweet and it really goes to show how much they've changed because of each other <33 Feels so good to be reading a manga with progression this satisfying. Thanks for the translation!