A bit late, but if the translator is here the 1.1 final bubble has a typo. All the girls are thinking "we can't hear you". Since they can and they've got anger marks on their heads because they can't study, should be "can".
This was discussed on Discord. A second translator reported: 'Looks like 聞こえねーよ! which means "can't hear".'
And the SFX is 'monmon', the dictionary entries for which are "anguished, distressed, worried, discontented" and "horny". The original SFX TL was "irritated", but got changed to "horny" and "bothered" (or maybe 'bothered' was already there, I forget.)