Actually, as far as I can tell, none of the SonoHana games deal with sexuality issues or insights of that kind.
iirc, they are set on:
avoiding the "but we are both girls" situations. <- suppose this is why it is not addressed.
no guys or other girls will come by to sweep (or attempt to) one of the girls. no NTR.
(along with other minor stuff on that link)
Also seems to tend not have much dramatic moments, there are actually like 2-3 throughout all the games. as well as love triangles.
the focus is the romance between the 2 girls alone where the girl always gets the girl, and the relationship itself after that... and ofc the nice love-filled sex. They aim for simple feel-good stories. Which might result dull at times.
(tho the "new generation" game has 3 couples who are in the same class interacting with each other, has quite a lot of dynamics going on, and the characters seems to have much more going on resulting in something with much more substance and depth.. makes me which that one had been officially translated instead).
Anyways, that is the reason why I and many others appreciate the series.
