Spotted Flower/WMG

The Husband and Wife are indeed Madarame and Kasukabe
Shimoko is making use of this series slow pacing and long release schedule to tie with Genshiken's ongoing 2nd Part; being clever in not naming the protagonists till Genshiken 2 starts opening (or finishes with) the way for Madarame and Kasukabe to start a relationship, so far he's only giving subtle hints for fans to catch on it, and only then he will make all conections clear.