Yes his upset but his trying his best to understand the uke's situation, and it's not like the seme wanted to make the uke feel that way. And if your saying the seme is so quick to assume bad things... What about the uke? The uke assumed bad things as well. Even if it's different situations. (in fact it was like that for both parties since chapter 1-10 with the whole dating or not dating crisis). And idk if he's really keeping in touch like that, it seems like that guy just texted him and he was like 'no'. The fact is the seme would have willing block him.
Guys the seme is trying understand what happened plus he understand he shouldn't be upset with the uke. I wouldn't call a guy that trying to be aware of his parents feelings toxic. I think what everyone should be upset about is how they didn't at all fully talk to each other about what happen that trip.
Partners not parents lol*
Or about the fact that that blonde guy still won't back the f off
I think the blondie is not the reason mimori relationship ruined. Well as you can he is assaulting mimori but that's a different story. Right now the top is the who makes the decision where to believe his bf or not, for me he's kinda selfish (toxic) he's so quick to assume bad things, and now who tf keep in touch with their sex friend when you have a bf iwjrjdaksjsj asshole instead reassuring mimori he makes mimori thinks that his feelings this troublesome and annoying bruh.