I don't get the whole rape being attractive thing. A woman struggling and saying no is pretty gross/scary.
:D :D In that case I have raped few girls by now (and I am a girl too). :D :D
Girls can rape, you know. It's hardly unheard of.
And given how many people don't seem to understand the concept of consent, and the popular myth that rape involves a scary stranger dragging women into an alley, it's actually possible for people to rape but believe they didn't do anything wrong. So yeah, if you've had sex with someone saying "no" to you, or only saying "yes" because they're really drunk, then you might have.
Now this particular story could be different though, since as has already been mentioned it's customary in Japan, or at least Japanese fiction/porn, to have some token resistance before going ahead with sex. Hell, look at all the stuff that uses "I'm so embarrassed" as a stock phrase to indicate that sex is happening. And of course, the story is already set up as something that doesn't really happen in real life so at least you've got a little separation there.