People do stupid things when they're uncomfortable. If there's a theme to this volume of My Love Mix-Up!, that would be it - that feeling awkward and on the spot can push people into doing some truly ill-advised things. Ida and Akkun are at the forefront of these behaviors, much to the distress of Hashimoto and Aoki, and while it doesn't quite come off as a marker of (im)maturity, it definitely paves the way for some monumental misunderstandings.
Some of those are more nonsensical than others, of course. Should Akkun 100% have known that "Sumo Hashi" was a terrible nickname to give to a girl who's crushing on you? Yes, yes he should have. Should Ida have not told his friends that he's dating Aoki? That's much less clear, and it only becomes an issue because Ida doesn't entirely understand how Aoki's anxiety functions. Basically if anxiety was fuel, Aoki could power a vessel on two loops around the globe, and that's pretty foreign to Ida's easy-going mentality. But part of building any kind of relationship is learning how to get along with each other despite any quirks, and that's something that Ida is definitely learning in this volume. It's lovely to see, and the near-total absence of gorilla faces can only elevate this entry in what is proving to be a consistently good series.