Man I have love-hate relationship with this series. I like the concepts and the story telling, heroine's background is properly fleshed out and able to give you a deeper attachment to her predicament, while kazuya as pathetic as he is sometime able to pull up some brave moves, though most of his dialogue are just a total simping line (go read ch 53 again, it's so just so cringy).
But the supporting characters are just total whack, ruka's affection started by this ridiculous "No heartbeat condition" unless she was near the MC. Bruh I guess every time my fitbit went crazy near a girl I should force her to trial date with me, what's funny is this was the last development we got from ruka and other than that she is just being annoyance to kazuya by continuously guilting him into a relationship he doesn't even want (which tbf kazuya is also at fault here by not giving a decisive "no"). Other than that the only sole purpose of ruka is becoming a threat for heroine's secret to mc's grandma which on itself has already been undermined, at this point she no longer got any reason to stay in the plot but simply just as an eye candy.
While sumi, as sweet as she is her date chapters are continuously dragged on that can be finished in 1-2 chapters, god I really liked her personality but she is just unnecessary characters that doesn't contribute anything to the plot other than being a place for mc to vent. Sumi just became Eye candy #2.
Yaemori in the other hand introduced late into the series yet she gave MORE push on the overall plot and story compared to ruka and sumi combined! Especially on the initial stage of film production arc where she took initiative, being decisive, and act as the only cool-headed and mature character in the room compared to the main couple, what does that say!? Oh did I also mention that all this mess can be avoided if only both mc and heroine decided to be not automatically retarded every time a new conflict comes up just to drag them to another mess for a convenient plot build up? Jesus christ what a dumpster fire this is, at least it is still better than domestic na kanojo though I won't throw the possibility that it can became one.