The commentary said that it's a scene reference to the anime, but I don't know the specific episode because I never watched it.
I can anecdotally confirm that. I don't remember the exact episode, either, as it's been a long time, but an antagonist appears and sabotages a public event by rigging a disco ball up to emit waves that debilitate Miss Hanon. Presumably, it would work on any of the main cast that aren't human, as it doesn't affect her date. He makes a big-brain deduction that it's the disco ball making her so uncomfortable, and breaks it with a punch. However, while I know it causes her so much distress that she can't move, I don't remember it causing her to fall out of her human form as depicted here.
I can anecdotally confirm that. I don't remember the exact episode, either, as it's been a long time, but an antagonist appears and sabotages a public event by rigging a disco ball up to emit waves that weaken and deeply disturb Miss Hanon. Presumably it would work on any of the main cast that aren't human, as it doesn't affect her date. He makes a big-brain deduction that it's the disco ball making her so uncomfortable, and breaks it with a punch. However, while I know it causes her so much distress that she can't move, I don't remember it causing her to fall out of her human form as depicted here.
According to DeepL of the commentary, the skeb request was to redraw a scene from the anime, but with Hanon in her mermaid form.
