I liked it, and Hiro was really cute, but it felt a little... creepy? My sister's ace and there are multiple times in the yuri manga around here where I think I see ace/aro characters, and then they meet "the one" and it erases all of that. "Bloom into You" is pretty dang close, but I think it's coming to that point, too. Like, it's a little different here since the MC is sorta floating through life, never caring for anyone that gets close to her, so it makes sense that "the one" suddenly makes her smile and want to turn a new leaf. Just, I don't know, I've seen this plot so many times in yuri and it never ceases to make me wonder if it's being a little inconsiderate.
I think that more than the having characters being ace/aro - lately they are making more ace/demi characters... but that aside, just cause a character is ace, it doesn't mean they can't find "the one". Not all ace are aro too. I think that most people who make ace characters find "the one" are just trying to draw their idea of "happy ending" for an ace. While I agree that it may be a bit of a inconsideration to some ace, I believe that it can also be a relating idea to some. A lot of ace do want to find "the one" aswell, but that's cause they're interested in the "emotional bond" of the relation, not the "sexual aspect" a relation can have.
I'm ace myself, and personally I do like these kind of stories. From my side, even if I'm an ace, I also do have an "interest" in other girls, though my "concept" of "interest" is different from the "norm". I'm saying it that way cause a lot of my friends don't understand this, and personally I could relate a lot with the thoughts that the main character was having. At times you do get those thoughts, and you crave for a person to understand you or to try and explain to you these things you "can't understand".