Hah - I have my gripes with this manga, but not at all with this chapter!
This is a wonderful Mamizou move to pull (down to the level of charades used just for shits and giggles), it's nice to get some bonus characterization for minor characters like the Tsukumo sisters that isn't just outright flanderization, and himbo-coded Mamizou is so funny, I am completely on board with it. The pacing was great too, this was just a nice, well-rounded reading experience. Here's to hoping that that's a good sign for future chapters of this manga!