I finished it! This was good.
Page 123
What are the terribly handwritten kanji/kana in the upper panel?
Kon: 話してるとき楽しそうだなーって
Initially I was unsure whether it was fun for him while she was talking, or whether it he’s saying that it seemed like she was having fun, but… because it’s 楽しそう, right? If it was him, he would’ve just used 楽しい?
Kasane: 子供の頃から興味を持たざるを得なかったというか
Is using 持たざる something like an expression with 興味? Is that why it’s not just 持たない? (And is it a conjugated 持つ or just its own word? It’s my first time seeing it.)
Page 126
Kasane: 思ったより ずっと人間だなぁって
Is that a deliciously ambigious “(You’re/I’m) even more human than I thought”? Still, what a weird thing that must be to hear for Kon, even without the subject being specified.
Page 129
このバグは誰も気づきこそしないけど 大規模には違いない
I’m a bit confused by this sentence having both こそ and けど.
- With only こそ: “Precisely because nobody is noticing this bug there is no doubt it’s large-scale.”
- With only けど: “Although nobody is noticing this bug, there is no doubt it’s large-scale.”
…but how is that combination working?
Also, what exactly is the こそ highlighting? Everything that came before it, the whole このバグは誰も気づき?
And what’s up with that whole continuative + こそ + しない anyway? Is that grammar, or an expression? I can’t find anything about it.
Page 135
Why is she calling Kon (or what is happening here) a 例外事象の中の例外, an “exception within an exceptional event”? Isn’t it just the “normal” exception, a 残留物?
Page 136
紺はバグとして解消されず結果ここに留まった
“Kon remained here, without being cancelled as a bug”?
Page 138
このまま何も問題なあく…とは いかないだろうか
Is that “‘Like this, it won’t be a problem…’ …you can’t say that, can you.”?
Chapter notes
I love this chapter for so many reasons.
From the bug perspective, precisely because nobody is noticing it, this is a fantastic bug. The thought of bugs meddling with the human mind is fascinating and terrifying at the same time, and I don’t know why it didn’t occur to me earlier how interesting this would be with Kasane around.
And on top of that, more so than the previous chapters, this one actually had a memorable and emotional story, with Kasane at first just wanting to observe Kon, but then clearly getting more attached to him, while knowing that soon he’ll be gone and she will very likely be the only one to remember him.
Also, of course: What a twist.
6/5 points, more please.
Favourite page: 125, where Kasane wants a cute tail so that she doesn’t have to add an exception to the rule.
And aww, Kasane trying to make the most out of their supposedly limited time, without being able to tell Kon why. And that top frame of page 130 where Kon is being erased in the water reflection…
Answers to other people's comments
But look how happy Kasane is about the differently-colored water fleas! 
Yeah, this was absolutely stellar!
I wonder if the author planned to do this from the very first chapter.
(And then spent the time on staircases and insomnia instead to lull us into a false sense of security…)
I agree, although it is weird that a bug like that should be limited by physical distance. The bug changes the physical reality and everyone’s memories to back up it’s story (down to making a bank account with regular payments for Kon!), but then it drops the ball because Kasane’s father is a bit far away?