I was able to watch this for only ~5 minutes. Mumei was dying in the beginning, and by the end they were both dying. I'll need to watch this whole thing later.
I heard Bijou said she played Splatoon with IRyS already. I wonder what the timing of that is, because it was pretty recently that IRyS mentioned thinking EN audiences don't want Splatoon, and even more recently she went over her anxiety about collabs. Basically I get the feeling that she's pulling back into her shell and even a Splatoon partner wasn't enough to open her up. Well at least not quickly, maybe over time.