The Key to Their Heart

Y/N lands on Earth after being held hostage by Laufey, the leader of the Frost Giants. The Avengers take her in and train her in order to defeat the enemy, while she creates a strong bond with two of the most complicated individuals: Bucky and Loki.

Will she finally break free from her fast and take revenge on Laufey? Will she catch Bucky's eye? Or perhaps Loki's?