Glad to see it all updated to MangaDex; having everything in one place is just really nice and I'm grateful for the time taken to make it happen.
But yeah. This series grabbed me from the first chapter, and it's only gotten better, in my mind.
As some others have said here, the rather mature, grounded drama aspect of the relationship between Kyou and Takaharu fits them very well. It helps that they're adults, and that this dynamic and their situation do lend to keeping secrets and being hesitant with simply opening up all the way. Who they both are as characters sells the fact they'd be tiptoeing around their shared history and time apart, and none of it feels contrived or forced or unnecessary.
I do expect we'll get the full story on Kyou's past and why she left college, Takaharu, and disappeared for 17 years. Given she says she raised Minori all on her own, that tells me there were no parents, no other family members, who were there to lend a hand--or to seek out and ask for help.
Case in point - when Kyou was sick, she frets over feeding Minori, and whether she even has ingredients - that's a single parent who only has their own paycheck to provide everything, and things like "enough food on the table" becomes a luxury. To say nothing of Kyou and Minori both being a bit gluttonous. If food was actually a matter of uncertainty, the sudden bounty of Takaharu's kitchen and table would absolutely see them indulging at every opportunity.
(and perhaps in Kyou's case, it was before with her own family, as well - we see her in Takaharu's dream/memory getting excited over his grandmother inviting her for food, and she ate a lot around him then, too. No way to know as of yet...but maybe this 'food focused mindset' is because she only ever knew food security when she was with Takaharu. That's my own personal theory, but food brings people together, and it being such a central theme to both Kyou and Minori makes me think there's some contextual relevance to why they indulge so much when it comes to him and this new life they all share.)
All that said - yes, Takaharu feels he overstepped. But what his sister said was true, and he himself confirmed it chapters ago: he does have a habit of looking back and regretting. When they were together, he chose to focus on his art, and he didn't look at Kyou enough. And she, for whatever reasons she had, chose to step out of his way and leave, rather than involve him further.
And he didn't stop her. He didn't say anything, and then he never went and looked for her.
As he says in chapter 14 - "I lost myself in my own whims, and neglected what was actually important."
He regretted it for 17 years, to the point that his last words to her were "you can come over at any time, okay? Even if it's something like being hungry."
He's got a second chance, and he's scared out of his mind, it would seem, or doing anything that would make her hate him, and make her leave again. But his sister is correct: better to try, than to sit, and regret again.
Thanks for the TL work on this. Easily one of my favorite series.