Such a waste of development,... maybe this is not as good as I thought. She is HIGH-level tsundere, maybe more Tsundra. I think we won't get any further without the parents cancelling the obligatory engagement, and they feel like its not necessary to be together and pretend. But they want to so maybe confessing? I believe this was planned from the parents(the arranged wedding), but maybe not. Another option for progress would be a rival but I hate rivals so I hope not. At this point its quite unbalanced relationship, the guy has clearly shown he is interested while being just abused/bullied/played around by her.
I like teasing like Takagi-san or such but this ain't like take at all
Oh, btw in raws,
i don't get why they introduce a second recurrent couple (Who are 'friends' (?) to the main couple and are much closer as a couple ). Also, there isn't much development until last chap 23, she was crying and he hugged her to reconfort her, she suddenly come back to her senses and slapped him real hard. What the hell