It's a Tony/Loki fic with the premise of a soulmate tattoo that's the first words your soulmate will say to you. Tony's words are really bad and interpreted as a rejection or as though his soulmate hates him. Loki gets his words and with the help of Frigga uses magic to see a young Tony, and I don't remember the specifics but he must see Howard abusing him in one way or another. Jump forward a few years, while Tony is waiting for the soulmate who'll reject him, and Loki thinks his soulmate is still a child because he has no idea that humans age so quickly and have such short lives. Now for some reason Thor and Loki come to earth, potentially to find Tony, I'm fairly certain this happens after the events of Iron Man 1. Loki sees Tony and thinks he's Howard and says some harsh words. Obviously, he realises his mistake and it's a happy ending.
That's all I remember but there might have been a sequel that wasn't finished, I'm not sure of that though.
Any help would be so appreciated.