Thanks for the heads up. I had no idea this had an extra episode https://myanimelist.net/anime/31530/Classroom%E2%98%86Crisis__Tabi_no_Haji_wa_Uwanuri and never had a translation. Two english releases and they purposely left it out. There's better raws tho https://nyaa.si/?f=0&c=1_0&q=Classroom+crisis but at least yours will be seeded.

https://kitsunekko.net/dirlist.php?dir=subtitles%2FClassroom+Crisis%2F Try the above subtitle, if you can't find any other sub for this episode. I just simply translated a Russian script (Beatrice-Raws) using Google translator and made some small changes to make more sense (at least to me). Some lines didn't made any sense to me, so I left it as it is. OP and ED are from DameDesuYo. Note: I don't know Russian or even Japanese. Just used my experience of watching several dozens of subbed anime. Note2: Some lines may not convey the meaning perfectly, but you should be able to get the gist of it.