Can I keep you? Part 1

Imagine being Tony Stark's adoptive daughter no one knows about because you're studying abroad. One day you come home without saying a word and all the Avengers are confused by your appearance and especially Loki being quite smitten by you. The Avengers, especially Natasha being very protective of you when they notice the tricksters' interest in you. You on the other side, being the curious girl you always were, wanted to know more about the mysterious guy and the world he comes from.