We still don't have confirmation on WHY Tekehiko and Sachiko divorced, but Hitoka did alude/hint to infidelity on Takehiko's side (I think?) or did he go find someone else to date immediately after the divorce?
Also I kinda expected this to happen for Shoichi, he was having it too easy so far depending on what route you end up in. And thank you for writing this route, he's kinda the normal one tbh like IRL relationships are all different and have nuances of their own