This kind of feels like the author is getting rid of all of Ranna's love rivals just before the end of a story. It's probably a good enough place to start thinking of ending, but I hope not and we get quite a number of chapters more of these silly slice-of-life fillers and story arcs. Rokudou still needs to grow a whole lot more even though he's becoming a far more confident man capable of standing proudly next to Ranna.