So much for the field trip giving us a hint of whether this is actually yuri or not. The longer it goes without any obvious romantic signs the more I start to think this is just a friendship manga with only the barest hint of what could, very charitably, be called yuri undertones. I'm not asking for relationship progress. I just want to know if I'm actually reading a yuri manga or not. In any case, this video will always be relevant:
https://www.youtube.com/watch?v=dLoRO87lu_8
Edit: Ah, the yuri tag was apparently removed and I didn't notice. I know for sure I found this manga while searching the tag and starting following it then, so I have no idea when the tag changed.