What a wonderful chapter. The way that Hibiki cares about Saki as her own person, not just her daughter's friend, is really rewarding to see.
I agree with all of the others who have focused on Saki being someone who tends to prioritise other people; however, Saki's conversation with Hibiki is used to highlight that Saki's tendency to prioritise others also means that she herself lacks firm priorities. Hence her lack of any real goals for her music career and her inability to even comment on it effectively. Hibiki giving her guidance on the issue and offering a path forward is a great intervention on her part.
The other facet, I think, is genuinely recognizing that their relationship isn't necessarily well-equipped to handle living together. At least currently. Their relationship is simultaneously too intense for them to succeed as casual roommates, and too ambiguous for them to succeed as partners. The potential for conflict is huge, and Hibiki seems to recognize that even if she doesn't recognize the romantic feelings that underpin it.
The implication of the final few pages seems to be that Saki's "weak will" problem will be put to the test as she has to fully confront the fact that if she wants a future with Kanon she'll need to start making decisions about how to develop their relationship further. Inertia is not enough!
I loved your perceptive comment!
In another thread about this chapter, I actually addressed that very point with this line:
"Moreover, I believe their conversation about career futures planted this realization in Saki: if she wants a lasting relationship with Kanon, she must start planning her future more maturely."
The core of Saki and Kanon's relationship lies in the fact that their feelings for each other aren't only friendlies. Yet, for different (and valid) reasons, neither has managed to express that desire assertively. Saki struggles with deep emotional repression, while Kanon is emerging from longterm isolation and only beginning to reconnect with others, because of this, she still lacks the sensitivity to fully grasp what’s happening inside Saki (though I doubt it’ll take long before something happens that makes Kanon aware of Saki’s wounds). For Saki part is so trapped in her own emotional restraint that she fails to understand the true nature of Kanon’s advances. This is precisely the meaning behind the title
Amayo no Tsuki: emotions that reside within the other but remain hidden from plain sight.
Despite they haven’t converged emotionally to realize they’re mutually in love, Saki and Kanon have compatible and complementary personalities. Once they mature in these aspects, they’ll be on their way toward building a mature & realistic future together. However, everything suggests Kuzushiro is conveying that for this promise to be fulfilled, both must first grow emotionally and confront their respective realities.
As you rightly noted, Saki lacks defined priorities—but this aimlessness stems from her emotional repression. Despite this, she’s shown talents others have recognized, like her gift for teaching and a piano performance that captivated and earned praise. The piano, in particular, is deeply tied to emotions she’s tried to suppress: her longing for attention from the three women who shaped her life—her mother, Umehara, & Kanon. The day Saki makes peace with her past, stops feeling guilty for how she loves, and accepts her emotions, will also be the day she reconciles with music. Only then can she freely choose the future she wants and fight for that promise.
Ironically, her conversation with Hibiki—who, despite her genuine concern for both girls, also wants things to stay within the bounds of friendship—ends up flipping a switch in Saki. That talk becomes the catalyst for her arc: it’s the first time Saki admits to herself that she isn’t content with just being Kanon’s friend—she wants
more.
Never forget Ayano’s words to Kanon (Ch.27), foreshadowing this relationship’s near future:
"If she ever finds herself in a tough spot, make sure you can be there to help her."