Limerence

It does not surprise him at all to know that Hermione Granger has come to think herself half in love with him.

But it is not to last, and it is that night, on the night of the school's annual Hallowe'en dinner, that he knows that Hermione Granger's opinion of him is about to rapidly shift.

And how could it not?

Because at his feet, there is a dead body and she...

She has seen it.