Except I dont think yiyoung has ever actually communicated that interest to Kang, meaning Kang is knowingly doing it even if yiyoung wasnt into it. In the first place, yiyoung was not expecting that sort of play to happen due to the reasons it did. There's a differemce between acting it out and having had a discussion beforehand without actual heavy emotions involved. The truth is it isn't a session play they are doing atm. It's the real deal, as in yiyoung actually didnt want it to happen in that moment and Kang did it anyway. Kang doesnt even fully know it's one of yiyoung's fantasies yet.
isnt this kinda a little bit of what people call.. RAPE.