>>280888330
This chapter confirmed that she wasn't the super master manipulator that everyone thought she was. She's just a shallow girl who coasted off her beauty. It's in line with her previous characterisation.
As for blushing and falling in love. This was already set up from the cake chapter. And one can intrepret it as her finally facing someone who can see through her rather falling for her ploys.
>>280889838
Just apologize for real. Shizuki isn't the type to hold a grudge.