Welp, the Pixiv page has the yuri tag (edit: only some of the chapters have it actually) ... but looking a head through the 38 chapters/extras posted (and not understanding what's being said at all) there isnt any physical development. Theres a few blushing scenes, but thats about the extent of it.
I get the feeling it's still a developing unrequited love situation (Hina), but it's anyones guess as to where the series will actually end up going.
Reading through the chapters we have so far in english, there's not really been anything beyond friendship displayed from Ashi.