I can't read the description. Is this Hentai or something?
Edit:
So what I can decipher from GT she has a boyfriend, and it is serious. Possibly getting proposed soon. But she suddenly has an accident and she is having memory issues. The guy she fell into is trying to take advantage of her confused state and standing in as her boyfriend. And the sex suddenly gets more aggressive.
Shouldn't this have an NTR tag with it's Hentai one?