beta
Gonna take this chance to remind everyone that their relationship has only taken place over a small amount of time, like a few weeks to a couple months, based on how the timeline looks over the chapters after they start dating. Down low relationships take time, and I know some of us are used to faster paced relationship progress but it seems that this manga tales the time to get Shizumi slowly into the process of being more open about himself and the relationship. Like in the last couple chapters, where it's starting to be hinted that he's noticing the accommodations that Kiumi makes for him and he even made a small comment on it last chapter.
This is gonna take a bit, cause that's how it works. People who are very closeted and unable to openly express their relationships don't just wake up one morning and go,
"I'm in a relationship now! Time to tell everyone!"
Even in straight relationships, this is sometimes the case, granted for different reasons, but that's just how it goes.
(No, I'm not arguing with anyone, thought I'd mention that cause back when comments used to be open people got heated during debates :/ )