-Mnemosyne-

There was no other explanation. The magical ramp kept boys out of the girls' dormitory, and Ron certainly wouldn't know a counterspell.

But he was sitting on the edge of her bed, and she was drowning in his eyes, and he was drawing the curtains, shutting out the world, slowly leaning forward…

The other girls slept silently through it all.

It had to be a dream.

Until the next morning, when she saw strange scratches on the stairs leading down from her dormitory, and saw a new book poking out of Ron's satchel:

How to Scale Pyramids: A Treasure-hunter's Guide.