hah! perfect timing, I was just reading the light novel earlier today. thanks a lot for translating bith the manga and the LN, looking foward for the next update of either~
When Shimamura said that her little sis does the same thing, Adachi ask herself if it's a bad or a good thing she is been consider like a little sister and Adachi ask herself more about if she love Shimamura
I recommand to read the LN because there is more details and also because the LN are at volume 7 where the manga will stop at the 3rd volume of the LN.
I've read a review of the LN on LightNovels.com and the dynamic described between the two seem pretty different from the manga and I'm not sure I like that.
Strange because so far it seem for me that the manga follow the LN pretty nicely. It maybe lack some details but the most is here. Like i said before the manga has ended in the 3rd volume of the LN and the LN is still ongoing with 7 volumes. Personnaly i prefer more the LN so far cause it's the original support but the manga is quite nice too.