@VincentYamato More like a sadistic tsundere... "Oh, your back hurts if I just touch it? Well, let's play a game where I get to slap you on the back and watch you writhe in agony. Sounds like a lot of fun, doesn't it?"
@VincentYamato
I wouldn’t say she’s a tsundere, she’s pretty head over heels for him and pretty upfront about it, she just happens to be the kind of person who thinks putting a frog down the shirt of the person you like is an acceptable show of affection.
I want to say that she has locked him into a situation that he will now know she likes him but he can't say it
thus forcing him to confess
but knowing the author, he won't progress anything or even start the 'dating tease phase'