That one side of this relationship started off completely around platonically groping boobs will forever be one of the funniest things I've seen in a manga.
With that boobs, its hard to hold back. Getting caught is the best way to stop. I bet mc would say some lame excuse. There's no way she'll say it's her gf as cover.
I love their reactions as they start to realize what they're getting themselves into. I enjoyed it so much that I'm not even upset that they might be interrupted.
I mean who knows, this might be a new addition to our voyeur fanclub.