I guess that at this point in terms of tags we have to face the fact that up until now yuri has been a "romanti-normative" (I just made that up) genre--protagonist pairs where neither character ever wants to be together with the other one romantically or sexually but who both consider themselves to be "together" as more than friends just don't fit any of the established romance categories.
This series poses the question of what stories built around such characters, something obviously desired by aro-ace readers, are likely to look like going forward. I would call this one, perhaps because there are few existing models of its type, a noble failure (I have no personal investment in aro-ace representation) because the author was obviously unwilling (for perhaps obvious reasons) to have Yuriko and Matoi clash over their differing desires for their relationship.
The avoidance of angst meant a fair amount of on-the-nose exposition about asexuality involving clunky dialogue and an overall low-key tone that was pleasant enough in itself but, once the MCs established and accepted how they felt about each other, did not lend itself to very interesting scenes because there inherently wasn't much dramatic tension to resolve.
So I felt like I met some nice imaginary people for whom I wish only the best going forward in their imaginary lives, but as a story it was only intermittently interesting. In fact, it felt like the aro-ace equivalent of stories from well over a generation ago that were intended to show that homosexuals were nice normal people too. (So maybe once the character types get established more firmly we'll get to see what an aro-ace yandere might look like.)