Harry disappeared for three whole days, which made Hermione very cross. He didn't tell her specifically where he had gone, but she pretty much knew his intent. She'd asked him for something, and he was such an insanely lovely boyfriend, or whatever his role might be called these days, that he wouldn't rest until he'd delivered it for her. Her heart swooped at the very thought, until her intense misery at missing him kicked in and she started calling him names.