I'm sure no one cares (not even speaking about "needs") another whine comment, but
It is unrealistic. I don't know much about people speaking and moving like this while sleeping, I don't have experience (though I highly doubt it). But for such a character it's just impossible.
The scariest thing is if jap readers like this development and series doesn't sink it popularity. Ridiculous that only in this case we will see the continuation. Double-edged sword, huh.
Maybe author will wrap it in some "lust -> attraction -> finally some romantic interest", or even "power of forgiveness", though I doubt I would want to see any of this.
The one who I have to blame in the end is myself, because I should become vigilant at starting to read japanese work. And became thrice vigilant after boobs forcing. Really, I got myself frustrated today.
tl;dr I am sad
UPD author female? no comment