(Bucky X Reader) [COMPLETED] y/n Rogers, Steve's younger sister. The two Rogers had always watched each other's back since they were little. The youngest Rogers had always had a soft spot for her brother's best friend, James Bucky Barnes, but she thinks that she'll never be more than "Steve's little sister" for him. Bucky got enlisted and her brother got a part in the "Operation rebirth", thanks to Doctor Abraham Erskine. But something will go wrong and she has to get the serum too. Will everything go well for the three of them? Feel free to comment and vote <3