He would definitely break up with her at the end, or she would dump him thinking she doesn't deserve him or something, trust me, i've seen enough of these to know the trope....
Then he will ask her out for realz, you know the usual.... With extra cheese .
A little too cheesy for my tastes, but...
Yeah, they did a pretty good job adapting the novel so far, the novel was to cringe for my tastes (as it should be , i mean, its a novel, ofc its more expressive)
So far they did a good job toning down the cheese in the manga without altering the story, really hope the manga will reach the end...