Dmnit! It still feels like the emotional dynamics between Sakurako and Kasumi is out of balance. While Sakurako is obviously all in, on their relationship, it still feels like Kasumi is just using it as a marriage of convenience.
Kasumi is as in as Sakurako.
She's just a lazy fooker.
Having the volume covers be uploaded here as images has come at a perfect timing, as I have been re-reading Futaribeya over the previous several days (entered vol3 just earlier today)