I was wondering where the slit-mouthed woman from way back at the start went.

I guess we're seeing her childhood now?

I don't think it's the same one. Pretty sure back when she was a kid bubble tea wasn't a big fad.

Garrus said:

I don't think it's the same one. Pretty sure back when she was a kid bubble tea wasn't a big fad.

She has the same hair down to the bangs at least.

Considering the 'default' (for lack of a better word) MoGal setting has sapient robots in it, I think we can assume it takes place not in our time, but sometime in the near future. Which might be how Kuchisake Onna's 'flashback' here takes place in our time.

Girl defies physics to do that. Like, you can't suck the boba with two open straws on both sides of your mouth. You can, however, shoot bobas from those two straws by plugging the center straw with tongue to let the pressure build.