I have no idea what posses someone to turn into a anime villian like this and arbitrarily decides to ruin the life of someone they don’t know and had zero prior interactions with like that just seems like completely psycho shit to me, but bullying is just sorta like that I guess
They might not mean it that way. It's already been brought up, but I doubt the last page is literally happening, she's just upset that they're judging and putting labels on her metaphorically and it's causing a panic attack. Whether or not they're being intentionally mean or just careless is hard to say without a larger pattern of behavior. They wrote the lyrics on the board, was that to shame or embarass her, or was it just because they were working on translating a song in a language they don't understand fluently? They're needling her with commentary, is that because they want to put her down or are they just being thoughtless? Doesn't really matter to her trauma, though. I do hope Aya comes to the rescue, but this is something Koga needs to learn to deal with if she's going to keep putting herself out there as an artist.