Thanks as always for the translation, and I appreciate the content warning at the start too. Although this series obviously isn't anywhere near as grim or intense as some other series, in series like this where the tone is usually light and it's so easy and fun to really empathize and connect with the characters, a scene like this can be way more upsetting than one would expect.
Like I've said many times before... Ichijou really is just like me fr. I've unfortunately had some really bad depressive episodes before. And I've fortunately had a lot of loving and understanding friends during those times. I can think of many times where I ended up in this exact same spot, dragged along on a supposedly fun outing.
There's a tense embarrassed feeling where you want to vent but you don't wanna ruin the mood but you can't stop sulking and you almost don't want to stop sulking because you don't want to treat your own feelings so lightly and maybe for a second you start forgiving yourself before doubling down on the self-loathing because that would just be too easy and you feel like a jerk to your friends and but also why did they bring you here when you'd be much better off in your bedroom but no that really isn't true, it is a nice day with some good food and some good destinations with some good friends, and before you know it you have a bit of fun. Hopefully.
This chapter really captured that feeling well.