Thanks translator team.
@darara Yes.
@penizz Nope. I'm also angry at Mizuhara. Since moviemaking arc she acts more and more indifferent, making Kazuya total simp (earlier she cared more). And when Kazuya wants to end this (tell gran the truth before it's too late), she's not making any moves (end or confession) and keeps Kazuya around. And about supporting... He offers it, but "no, thanks, i'm fine". Kazuya pushed more than enough (keeping promises, offers help), but she acts totally cold without any signal (any more pushing can be just offensive if she's actually don't like Kazuya).
@Over_Analytic Too de(e/r)p. I don't think she is detached from her emotions completely. It's just very complicated relationships with Kazuya. For her he is more than a client, neighbor, friend, partner in crime (she is also lying to her gran), but not enough to be lover. And soon lies will end. So, who is Kazuya for her when there is no need to lie (1 gran RIP, movie goal done, Kazuya wants to stop faking relationships )? That is the question (imho). And author gives no clue - now it's like Kazuya to her is nobody without girlfriend/boyfriend lie.
At this point, this is a story of Kazuya's suffering.
Mami gave him initial trauma and complicated his life after dumping.
Mizuhara stopped him from ending this relationships several times. And it's not like she love him now, but keeps him around anyway.
Ruka gave him more troubles because "adrenaline junkie".
Mini - troubles, help, forcefully connecting him and Mizuhara for more suffering (Mizuhara be like "want hear that from him anyway, don't care about what he is thinking", Kazuya be like "welp, I'm done, can I leave her already? no? okay...").
Sumi... He's too dense and busy with other troublemakers.
Who cares about Kazuya? All of them "cares".
Mami wants to see him suffer. (Maybe it's proof she cared a little).
Mizuhara wants him around when she needs something. (Well, she saved him also).
Ruka wants to generate more heartbeating spicy situations with him and stops when situation can lead to breakup. (Maybe she also wants him as a normal boyfriend, she tried to fairly compete with "fake" Mizuhara).
Mini wants to play with Kazuya and Mizuhara. (She also wants to help, but result is bad).
Sumi maybe wants unrequited love thing. (She likes Kazuya, but can't be blunt about it and it's not like she's head over heels for him).
First 80 chapters... Good times (sip), good pacing, wanted more. Now no hope for a good ending, any ending will do.