Hehe the shoe thing is funny too me since I'm the only one in my family that pretty much takes my shoes off first thing by habit when I come inside. I had a Korean friend for along time growing up and picked it up from doing it whenever I went over to his house.
The first pic with both Iowa and RJ in it. Nice to see the artist didn't go for the obvious joke (Kongou seems to be Iowa's punching bag in that regard, for some reason; another artist did, but it was a trio of pictures and it had both RJ and Kongou as the butt of the joke instead of just RJ) and instead went with the newly-pooled "gross misuse and/or abuse of CV equipment" gag.
Incidentally, this is also the first pic with both the scroll and hammock tags.