Tony X Loki
Plot one : Tony is drunk and doesn't know what to think, Loki visits him at the bar and the two both get more drunk. They fall in-love with each other yet the Avengers want that to not happen.
Plot 2 : Toyn stark see's Loki at asgard when Thor takes him on a tour and see's the god with stitches on his lips and out of pain and agony for the god he takes Loki back to earth and helps the god get back on his feet.
Barton x Loki
Plot 1 : When Barton is under Loki's control they get friendly with each other, start falling in love yet Barton sane person wants out so Loki will have to beat him to get him to behave.
Plot 2 : Barton and Loki after five years meet up again when Loki wants no part of each other. Loki wants Barton after they save each other.