Hopefully this continues on toward their adult life. I wonder if societal norms will play a role in the advancement of their relationship. Living together while you’re at school is quite different than living together once you’re adulting. People bugging them both about marriage and asking them to attend mixers. I can picture Kasumi just telling Sakurako: “Let’s get married so people will stop annoying me.”
It almost sounds like you're impling that's going to be her main reason to marry Sakurako
And if you sincerely believe it would be, well... I can imagine at least 2 more important reasons... One by far so. And no, Kasumi liking Sakurako's cooking, while it would be a more important reason that people annoying her, it wouldn't be the one that'd be by far so.