I got as far as page 8 before the tears started welling up.
I can't say I've ever experienced the extreme isolation that comes from a language barrier - you on one side, everyone and everything else on the other - but my time in high school was spent in considerable solitude because I could never turn my brain off and, coupled with my then-unknown executive dysfunction, I tended to put people off to the point I just stopped talking to everyone.
Clearly not the same thing Mia went through. Those around her wanted to let her in, and be let in. The inability to communicate was a hurdle that needed to be overcome, but the intent was there, and none of the malice.
But that sensation of removal and being adrift in a sea of the unknown and (seemingly) unknowable is something I can fathom. And it hurts to read, even in a fictional story where I can hope that things worked out and happy endings were found.
But Igarashi handled it beautifully, both visually and in terms of her narrative, I think. The softness of those memories of the school really do reflect how it appears in Kasumi's time now; that distinct "dream-like" state that I think evokes a fitting atmosphere for a story of girls across time searching for and connecting with one another in the abstract world of the written word, where borders and boundaries can be dissolved and stark identities can be set aside in favor of whatever ideal is desired.
And, whether or not Yamabe managed to reach Mia or not (and sadly...it seems she has regrets, so...yeah), Mia landing covers of fashion magazines makes me hope that she found her footing, and beat down the walls that language had built up around her.
Thansk for your continued time and care with this series, as always.