At this point, ruka is just fucking annoying. She butts into everything, like a fucking stalker. She just wants to stick to the mc so that her heart can beat louder, she doesn't give 2 fucks about the mc's feelings. Honestly, this drives in the point that the mc is a wimp. He should honestly tell her, straight to her face that he loves chizuru and not her.
Also, is there a "ruka, fuck you. We hate you" club