@jetcornrex @grxbeh Thanks! Yes, you are right! I went through the chapters you both mentioned again and it looks like I missed out on that interpretation, especially in Chapter 50 where it was pretty obvious. Now I'm really feeling bad for Chizuru seeing her in this new light. Aghh next week...
I don't think the manga has ever shown that Chizuru has feelings for Kazuya has it?
The latest one was when Umi asked her and it seemed like even she doesn't know that herself.
All the other times they just showed her blushing but that's nothing given that the style of this manga has...