@Proxey
Nope. she asked directly in chapter 32 (p9, there are several flashbacks to that chapter later) and kept sending signals till the last day of moviemaking.
Examples of her showing feelings:
ch 50 reaction (p11) to failed Kazuya's hurr durr confession.
ch 103 asking Kazuya to realize her dream (p18 why so hyped anyway).
ch 122 talking to Mini about Kazuya, p12 admitting that even his feelings are true, he owes a
proper confession.
ch 127 p12 told Umi (also refused to be his gf) about her feelings for Kazuya.
ch 131 practically told Kazuya to stop avoiding her and confess.
ch 137-138 perfect situation for them to move their relationship to the next stages, both failed (by sleeping).
And after movie arc she stopped sending any signals and like caring at all. So now Kazuya can't confess directly in that situation, indirectly he got blocked. So for now, author sacrificed Mizuhara for more chapters. Mizuhara then was ideal caring gf for Kazuya, but now she made Kazuya perfect SIMP. And after ch. 138 highly likely she woldn't help Kazuya clear misunderstandings, maybe to the point of playing
hard nightmare to get.