Bucky is an Avenger, but he's got a secret... He's gay and dating Y/N Stark, Tony's 25 year old son. Bucky was once the winter soldier for hydra, but Steve saved him. Bucky is a big softie, only allowing Y/N do be dominate and no one else.

everyone on the team loves Y/N, Tony being his father but the others have a crush on him. Bucky and Y/N are getting married in secret, hoping no one finds out.

Tony threw a party, then Y/N sees Yelena flirting with bucky and he gets jealous.