Yeah even the little bro caught on before I did, http://www.mangago.me/read-manga/horimiya/mh/c037/28/
I guess because most romances like this, if they ever get to doing it, there's this big deal of when/where/how etc. But here it was like, "yeah we've done it--and possibly already a few times---now we are getting dressed". The whole thing was glossed over and not focused on so, it was somewhat refreshingly realistic, but nonetheless gave me a surprise. but really with two teenagers basically playing house all the time, no adult supervision, and slowly building up a relationship, it would be weirder if they hadn't stepped up their relationship with all the opportunities they have.
yeahh i didnt realized at first and until now i cant believe it how it happens
that one of the reasons i dont read this manga any more
dummy it doesnt matter if they do it or don't! I just read it cuz it is freaking funny... the other stuff is nothing compare to the comedy aspect of it ;3

Okay, so I've just re-read the manga because it hasn't updated in a while
And my initial impression of this manga was that it was innocent and slow paced,
then I read chapter 37 page 26 and realised that neither Hori or Miyamura are wearing shirts and Miyamura looks like he's getting dressed, my brain did a back flip when I realised what they were doing
HOW DID I NOT SEE THIS THE FIRST TIME!!!!???!!?!?!?!?!