Things Worth Keeping & All the Precious Things by Everettevans
Not sure if they've been recced here because I couldn't find anything. Both the fics are so well written!
Okay I love a cold and in-control Tom but I love a Tom who's struggling in the wizarding world even more. His realization that he's a nobody both in the muggle world and at Hogwarts, combined with his class differences with his peers, and most importantly Harry is explored very well. And Harry is so damn sweet yet oh so oblivious. It's a timeline mashup fic and completed!
Summary:
Tom Riddle owns one good quill, given to him by a boy who had so many he didn't bother to count. It was the first entry in the ledger.
Every gift Harry Potter gives him (the quill, the book, the ink, the gloves, the robes) gets a line, and Tom pays it back the only way he can: fixing Harry's homework, earning his marks for him, and eventually, kissing him on a cold balcony because twelve Galleons' worth of dress robes demand a currency beyond essays.
Harry thinks they're falling in love. Tom thinks he's staying solvent.
This is the story of every object between them, and the moment Tom finally stops counting.
This one has Harry and Tom grow up together at Wool's. There's no time travel and it's fem Harry. I know people usually dislike this trope but this one has lovely characterization and is recognizable as Harry. Also, the fic is definitely for the cold and calculated Tom lovers. Dude has his priorities (Harry) and does not budge lol. Total boyfriend material in this one if you ignore all the blackmail and murder (like Harry). But Harry's also not a pushover and has her own character arc. Seriously, read it. It's great.
Summary:
Tom Riddle kept everything that was his in a box beneath his bed: a tin soldier, a green marble, three buttons, and a red ribbon stolen from the suitcase of a girl who arrived at Wool's Orphanage on a Tuesday in November.
She was not crying. She was the only one who never did.
He kept her, too. He just didn't use a box for that.