Found it after some vod searching.
This is the comment that got her started. Not sure if there was any other degen posting beforehand since I was just skimming the vod.
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41:03 for timestamp just in case. She goes on for about 15 minutes between the hornyposting and the whiteknighting.
I don't blame her for getting annoyed. You'd have to be genuinely retarded to think this looks like a back.
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She also tells people to lurk for a bit to get a feel of the streamer's vibe, which is something more vtubers need to say honestly. Sasuga Tako.