I'm curious about how they actually remember Machino, given that they're supposedly facing her in "real life". Do they have memories of how she looked and sounded even though she's interacting with them through a screen?
IIRC, Sofia suggests something to the effect of seeing Machino clearly for the first time after they meet in the real world. Let me see if I can find it...
Yup. Right near the start of chapter 2, she tells Machino that she's happy to be able to gaze upon her face because she ordinarily can't see it. So from the perspective of the heroines, Machino the player character looked vague and nondescript. They have memories of their interactions (a full year's worth, at that) but being in the real world together is the first time they've seen her face and presumably heard the sound of her voice.
I wonder if them being able to recognize her is a result of whatever transmigratory magic isekai'd them into our world, a result of their already-maxxed out affection meters, or possibly both. I wouldn't mind having a conclusive answer to that.
The longer this manga runs the more impressed I am with it's writing. And I've been in since chapter 1.