>>76460876not that author, but if in the name of more engagement, anon's moral code I feel like is meant to be a characterization given to himself and by him and his friend group, and the way he carries himself outside of weddings is likely a reflection of that. Weddings are good places to drink yourself stupid, and let that part of you go out the window. It's also slightly established that Hoshikawa brings out this more degraded side of anon, whether he likes it or not. A certain kind of woman can make a man whether in a moment of weakness or his strongest resolve, question what he thought he stood for. Also in anon's defense, he was planning to uphold his moral standard by staying out of the way and having enough of a buzz to enjoy himself. That is responsible in a sense.
I think Matsuri being a bump in the road is appropriate considering who she is to the involved parties. Given that this is an adult friend group that mostly stay in touch via group chats, you aren't going to treat her as more than that, she isn't worth the headache. She's also kinda a bitch, so I don't feel like she was done dirty or anything.