I've been searching for a long Loki/Tony fic, but can't remember the title. Sketchy details - Pretty sure The Enchantress or similar female foe was in it causing trouble. Loki saved Tony's life in a roundabout way but Tony still gets hurt. Loki is fascinated by Tony. There was a little scene after Loki and Tony hook up and Thor was at the door trying to make amends with Loki. Early MCU, maybe even pre Thor 2.
Not much to go on but I hope someone remembers it!