@Thelonewolf You think so? Remember she's way too obsessed with Kazuya and sees Chizuru as an unrequited rival. If trial ends and your plot twist happens, then your theory can be possible, but it could feel way too out of the blue if not given a proper foreshadowing and conclussion. It seems that's the case, bc the pic i posted under spoiler marks hints at ruka realizing her heart is finally beating like normal hearts and got over her bradycardia.
Mami doing her reckoning can go beyond that. She's THAT type of girl that, besides telling Nagomi and his parents about renkano/Enkou activities, could tell everyone at the campus about Chizuru's job and make her life hell. Hoping that doesn't become the case, bc if Reiji has the balls to depict bullying and social condemnation for engaging into legally grey-to-black jobs, then i would get severe vietnam flashbacks to By Spring.
(PS: Yuri, you fucking sadistic and callous biiiiiiiiiitch!!! I'm still shaken and mfking pissed after that fucking chapter)
If the last thing happens, Kazuya will prolly do some PR stunts to make as if the reckoning didn't happen. Maybe even having to swallow his bad blood with Umi and ask him for help when the darkest hour for Chizuru happens. The overall tone and the demographics the manga is aimed prevents the story to have everlasting negative consequences for the characters' actions and Chizuru's talent as an actress will prevail over her past as a rental gf.