Harry just grinned at Hermione again as she hit him, only she would think a history book was a decent souvenir. He was glad that she was happy with it though and he started to relax, at least until she asked what he and Ginny did for Valentine's Day.
If he didn't answer her Harry knew Hermione would just keep asking so he shrugged. "We didn't do anything. We've just been away remember?"