Senpai knowing that he needs to improve himself is a really nice touch. I don't like the trope of loser mc who doesn't work on improving his own social skill. This does make me wonder if the author has plan to really have senpai and Nagatoro officially enter a relationship. That would actually be a ballsy move and a surprise for this kind of manga to have this much progress.
Hopefully this manga wont do the usual "one chapter of relationship progress, then in the next the progress is magically forgotten and we get +50 chapters of no progress", like it usually happens on popular romance manga.