I can't help but notice that our boy seems to be slowly falling for Tachibana, but...how? They haven't shown any reason for him to do so, and have actually shown more and more reason for him to hate, instead. Despite that, as the chapters go on, he seems more accepting and is blushing more. I have to compare this to that "Bride Brat" series where there's basically no chemistry and no events that show them getting any closer, but they seem to be getting closer because the author arbitrarily decides they are.