There's something right, somehow, about him having this diary, like finding an important possession you never noticed was missing until it's found again, and maybe it's a little weird but— but it's magic, too, and Harry is still twelve and magic is still, well, magical. [Harry/Diary!Tom, for All The Nice Things Flash Exchange.]
It was on Harry Potter's last day as an auror that everything went wrong. A raid gone bad, and the next thing Harry knew he was waking up back on Privet Drive on the day the first Hogwarts letter was due to arrive. [Harry/Diary!Tom, past Harry/Ginny, time travel, Slytherin!Harry.]