Thank you for the scanlation! This is most likely top ongoing manga so I'm always excited when I see an update. It also seems like a difficult translation job, since it is rather verbose but also a lot of nuance and depth that the translator has to be careful with. So props!
As for all the speculation on Emiri's orientation, I think what makes this manga so interesting is that it is not so quick to lay everything out for the reader, or at least settle things into neat categories. I think this is certainly a manga that explores "queer" lives, in that "queer" meaning non-normative. From the non-normative guardian-child relationship between Asa and Makio, to the ways Asa and Emiri both question the normative tracks and desires expected of them from school and family, to Makio's refusal to live the normative lives expected of her from her mother and sister (and it remains ambiguous if her sister also led a life that deviated from norms (not married? but with child?)), to Makio's own uncertainty about the institutionalization of long-term relationships: these all try to disorient us away from what we value as normative forms of kinship, friendship, and love. I think the manga does a great job in showing the frictions of trying to care for others even if you feel alienated or foreign to them. At the same time the manga illustrates how the pursuit of caring for others, be it either as friends, mentors, or lovers, is still worth the risk of traveling beyond what you think is familiar or normal, to move toward some foreign horizon.