On Christmas Eve, School Days' very own Katsura Kotonoha debuted as a VTuber! Had things went smoothly, this probably would've been just handwaved and remembered as this oddity that occurred.
However, that's absolutely not what happened that day. The model used on the stream they had wasn't of the best quality, to put it lightly, and whenever the person behind it moved in ways it didn't like, the model glitched out to hilarious results. Some were more benign, though meme-worthy in their own right, but the one that captured everyone's attention was the one referenced in this very image. Happening multiple times too, folks were quick to meme on it on Twitter, even as they were doing School Days rewatches in the midst.
They've announced a new stream for New Year's Eve, so let's see if they decide to take this feedback to heart. Probably not though!